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+//Example 7-1, Page No - 210
+
+clear
+clc
+
+t = 71.4*10^-6
+
+f = 1/t
+fourth_harmonic = f*4
+min_sampling = 2*fourth_harmonic
+
+printf('The frequency of the signal is %.1f Khz',f/10^3)
+printf('\n The fourth harmonic is %.1f Khz ',fourth_harmonic/10^3)
+printf('\n Minimum sampling rate is %.1f khz',min_sampling/10^3)