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diff --git a/2279/CH3/EX3.10/Ex3_10.sce b/2279/CH3/EX3.10/Ex3_10.sce
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+//Example 3.10

+clc

+clear all

+t=0:0.01:20;

+function y=signal(x)

+    y=x

+endfunction

+//Assume v(t) as ramp signal

+v1=t;

+v2=t+2;

+//Assume R=1

+i1=signal(v1)

+i2=signal(v2)

+a=2;

+b=2;

+subplot(4,2,1)

+plot(t,a*v1)

+xtitle("a*v1(t)","t in sec","a*v1(t)");

+subplot(4,2,2)

+plot(t,signal(a*v1))

+xtitle("a*i1(t)","t in sec","a*i1(t)");

+subplot(4,2,3)

+plot(t,b*v2)

+xtitle("b*v2(t)","t in sec","b*v2(t)");

+subplot(4,2,4)

+plot(t,signal(b*v2))

+xtitle("b*i2(t)","t in sec","b*i2(t)");

+c=(a*v1)+(b*v2);

+subplot(4,2,5)

+plot(t,c)

+xtitle("v3(t)","t in sec","v3(t)");

+subplot(4,2,6)

+plot(t,signal(c))

+xtitle("i3(t)","t in sec","i3(t)");

+subplot(4,2,8)

+plot(t,signal(a*v1)+signal(b*v2))

+xtitle("LINEAR SYSTEM","t in sec","a*i1(t)+b*i2(t)");

diff --git a/2279/CH3/EX3.11/Ex3_11.sce b/2279/CH3/EX3.11/Ex3_11.sce
new file mode 100644
index 000000000..c60dfd651
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+++ b/2279/CH3/EX3.11/Ex3_11.sce
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+//Example 3.11

+clc

+clear all

+t=0:0.001:0.5;

+function i=signal(v)

+    i=exp(v);

+endfunction

+//Assume v(t) as ramp signal

+x1=2*ones(1,length(t));

+x2=t+2;

+//Assume R=1

+y1=signal(x1)

+y2=signal(x2)

+a=2;

+b=2;

+subplot(4,2,1)

+plot(t,a*x1)

+xtitle("a*x1(t)","t in sec","a*x1(t)");

+subplot(4,2,2)

+plot(t,signal(a*x1))

+xtitle("a*y1(t)","t in sec","a*y1(t)");

+subplot(4,2,3)

+plot(t,b*x2)

+xtitle("b*x2(t)","t in sec","b*x2(t)");

+subplot(4,2,4)

+plot(t,signal(b*x2))

+xtitle("b*y2(t)","t in sec","b*y2(t)");

+c=(a*x1)+(b*x2);

+subplot(4,2,5)

+plot(t,c)

+xtitle("x3(t)","t in sec","x3(t)");

+subplot(4,2,6)

+plot(t,signal(c))

+xtitle("y3(t)","t in sec","y3(t)");

+subplot(4,2,8)

+plot(t,signal(a*x1)+signal(b*x2))

+xtitle("NON-LINEAR SYSTEM","t in sec","a*y1(t)+b*y2(t)");

diff --git a/2279/CH3/EX3.13/Ex3_13.sce b/2279/CH3/EX3.13/Ex3_13.sce
new file mode 100644
index 000000000..86f976a05
--- /dev/null
+++ b/2279/CH3/EX3.13/Ex3_13.sce
@@ -0,0 +1,33 @@
+//Example 3.13

+clear;

+clc;

+x1 = [1,1,1,1];

+x2 = [2,2,2,2];

+a = 1;

+b = 1;

+for n = 1:length(x1)

+  x3(n) = a*x1(n)+b*x2(n);

+end

+for n = 1:length(x1)

+  y1(n) = x1(n)^2;

+  y2(n) = x2(n)^2;

+  y3(n) = x3(n)^2;

+end

+for n = 1:length(y1)

+  z(n) = a*y1(n)+b*y2(n);

+end

+count = 0;

+for n =1:length(y1)

+  if(y3(n)== z(n))

+    count = count+1;

+  end

+end

+if(count == length(y3))

+   disp('Since It satisifies the superposition principle')

+   disp('The given system is a Linear system')

+   y3

+   z

+  else

+    disp('Since It does not satisify the superposition principle')

+    disp('The given system is a Non-Linear system')

+end

diff --git a/2279/CH3/EX3.14/Ex3_14.sce b/2279/CH3/EX3.14/Ex3_14.sce
new file mode 100644
index 000000000..94cefa850
--- /dev/null
+++ b/2279/CH3/EX3.14/Ex3_14.sce
@@ -0,0 +1,48 @@
+//Example 3.14

+clear;

+clc;

+to = 2; //Assume the amount of time shift  =2

+T=10;

+t=0:0.1:T;

+for i=1:length(t)

+    if (t(i)>=0 & t(i)<1) 

+       x1(i) = t(i);

+       x2(i)=0;

+    elseif (t(i)>=1 & t(i)<2) then

+        x1(i)=1;

+        x2(i)=t(i)-1;

+    elseif (t(i)>=2 & t(i)<3) then

+        x1(i)=2;

+        x2(i)=1;

+    elseif (t(i)>=3 & t(i)<4)

+        x1(i)=0;

+        x2(i)=2;

+    else

+        x1(i)=0;

+        x2(i)=0;

+    end

+y1(i) = 2*(x1(i));

+y2(i)=2*x2(i);

+end

+figure(0);

+subplot(2,1,1);

+plot(t,x1);

+xtitle("x1(t)","t","x1(t)");

+subplot(2,1,2);

+plot(t,y1);

+xtitle("y1(t)=2*x1(t)","t","y1(t)");

+figure(1);

+subplot(2,1,1);

+plot(t,x2);

+xtitle("x2(t)","t","x2(t)");

+subplot(2,1,2);

+plot(t,y2);

+xtitle("y2(t)=2*x2(t)=2*x1(t-1)=y1(t-1)","t","y2(t)");

+//First shift the input signal only

+Input_shift = 2*(x1(T-to));

+Output_shift = y1(T-to);

+if(Input_shift == Output_shift)

+  disp('The given system is a Time In-variant system');

+else

+  disp('The given system is a Time Variant system');

+end

diff --git a/2279/CH3/EX3.15/Ex3_15.sce b/2279/CH3/EX3.15/Ex3_15.sce
new file mode 100644
index 000000000..564986888
--- /dev/null
+++ b/2279/CH3/EX3.15/Ex3_15.sce
@@ -0,0 +1,17 @@
+//Example 3.15

+clear;

+clc;

+to = 2; //Assume the amount of time shift  =2

+T=10;

+for t = 1:0.01:T

+  x(t) = sin(t);

+  y(t) = sin(2*t);

+end

+//First shift the input signal only

+Input_shift = x(T-to);

+Output_shift = y(T-to);

+if(Input_shift == Output_shift)

+  disp('The given system is a Time In-variant system');

+else

+  disp('The given system is a Time Variant system');

+end

diff --git a/2279/CH3/EX3.16/Ex3_16.sce b/2279/CH3/EX3.16/Ex3_16.sce
new file mode 100644
index 000000000..a1ce9199a
--- /dev/null
+++ b/2279/CH3/EX3.16/Ex3_16.sce
@@ -0,0 +1,21 @@
+//Example 3.16

+clear;

+clc;

+no = 2; //Assume the amount of time shift  =2

+L = 10; //Length of given  signal

+for n = 1:L

+    x(n)=sin(n);

+  end

+  n=2;

+  for i=1:L

+      y(i)=x(n-1);

+      n=n+1;

+  end

+//First shift the input signal only

+Input_shift = x(L-no);

+Output_shift = y(L-no);

+if(Input_shift == Output_shift)

+  disp('The given discrete system is a Time In-variant system');

+else

+  disp('The given discrete system is a Time Variant system');

+end

diff --git a/2279/CH3/EX3.17/Ex3_17.sce b/2279/CH3/EX3.17/Ex3_17.sce
new file mode 100644
index 000000000..ab7272f88
--- /dev/null
+++ b/2279/CH3/EX3.17/Ex3_17.sce
@@ -0,0 +1,18 @@
+//Example 3.17

+clear;

+clc;

+no = 2; //Assume the amount of time shift  =2

+L = 10; //Length of given  signal

+for n = 1:L

+    x(n)=sin(n);

+    y(n)=-sin(n);

+  end

+ 

+//First shift the input signal only

+Input_shift = x(L-no);

+Output_shift = y(L-no);

+if(Input_shift == Output_shift)

+  disp('The given discrete system is a Time In-variant system');

+else

+  disp('The given discrete system is a Time Variant system');

+end

diff --git a/2279/CH3/EX3.18/Ex3_18.sce b/2279/CH3/EX3.18/Ex3_18.sce
new file mode 100644
index 000000000..ea9b05583
--- /dev/null
+++ b/2279/CH3/EX3.18/Ex3_18.sce
@@ -0,0 +1,14 @@
+//Example 3.18

+clc

+clear

+t=0:0.01:10;

+for i=1:length(t)

+    x(i)=sin(i);

+    y(i)=2*x(i);

+    z(i)=0.5*y(i);

+end

+if (x==z) then

+    disp("The given system is invertible");

+else

+    disp("the Given system is non-invertible");

+end