initial commit / add all books

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diff --git a/881/CH4/EX4.4/exa4_4.sce b/881/CH4/EX4.4/exa4_4.sce
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+clc;
+//Example 4.4
+//Page no 128
+
+Vc=10; //Vp
+m=1;
+Rl=10;
+m1=0.5;
+
+//(a)
+
+disp("(a)The carrier power is found by substituting into equation 4-18 (pgno 126): ");
+
+Pc=((Rl^2)/(2*Rl));
+
+disp('W',Pc,"Pc = ");
+
+disp("The upper and lower sideband power is found by substituting into equation 4-21 (pgno 127):");
+
+P=(((m^2)*Pc)/4);
+
+disp('W',P,"Pusb = Plsb = ");
+
+//(b)
+
+disp("(b)The total sideband power is ");
+
+Ps=(((m^2)*Pc)/2);
+
+disp('W',Ps,"Psbt = ");
+
+//(c)
+
+disp("(c)The total power in the modulated is found by substituting into equation 4-25 (pgno 127)");
+
+Pt=(5*[1+(m^2)/2]);
+
+disp('W',Pt,"Pt = ");
+
+//(d)
+
+disp("(d)The carrier power is found by substituting into equation 4-18 ");
+
+Pc1=Pc;
+
+disp('W',Pc1,"Pc ");
+
+disp("The upper and lower sideband power is found by substituting into equation 4-21 (pgno 127):");
+
+P1=(((m1^2)*Pc)/4);
+
+disp('W',P1,"Pusb = Plsb = ");
+
+disp("The total sideband power is ");
+
+Ps1=(((m1^2)*Pc)/2);
+
+disp('W',Ps1,"Psbt = ");
+
+disp("The total power in the modulated is found by substituting into equation 4-25 (pgno 127)");
+
+Pt1=(5*[1+(m1^2)/2]);
+
+disp('W',Pt1,"Pt = ");