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diff --git a/2414/CH8/EX8.9/Ex8_9.sce b/2414/CH8/EX8.9/Ex8_9.sce
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+clc;
+close();
+clear();
+//page no 290
+//prob no. 8.9
+//All frequencies in kHz
+W=10;
+fs=2*W;
+Tf=1/fs;
+mprintf('(a) The minimum sampling rate is %i kHz\n',fs);
+mprintf('The frame time is %i micro second\n',Tf*10^3);
+tr=0.01*Tf  //ms
+Bt=0.5/tr;
+mprintf('The maximum rise time is %.1f micro second\n',tr*10^3);
+mprintf('The approximate transmission bandwidth is %i kHz\n',Bt);