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diff --git a/851/CH7/EX7.12.7.2/Figure7_12_Table7_2.sce b/851/CH7/EX7.12.7.2/Figure7_12_Table7_2.sce
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+//clear//

+//Caption:Signal space diagram for MSK diagram

+//Figure7.12 Signal Space Diagram for coherent MSK system

+//Table 7.2 signal space characterization of MSK

+clear

+clc;

+close;

+M =2;

+teta_0 = [0,%pi];

+teta_tb = [%pi/2,-%pi/2];

+for i = 1:M

+  s1(i) = cos(teta_0(i));

+  s2(i) = -sin(teta_tb(i));

+end

+y = [s1(1),s2(1);s1(2),s2(1);s1(2),s2(2);s1(1),s2(2)];

+disp(y,'coordinates of message points')

+figure;

+a =gca();

+a.data_bounds = [-2,-2;2,2];

+a.x_location = "origin";

+a.y_location = "origin";

+plot2d(y(1,1),y(1,2),-2)

+plot2d(y(2,1),y(2,2),-4)

+plot2d(y(3,1),y(3,2),-6)

+plot2d(y(4,1),y(4,2),-9)

+xlabel('                                                                      In-Phase');

+ylabel('                                                                    Quadrature');

+title('Constellation for MSK')

+legend(['message point 1 (0, %pi/2)';'message point 2 (%pi, %pi/2)';'message point 3  (%pi,  - %pi/2)';'message point 4(0, - %pi/2)'],5)