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3. Pulse evolution on string A string of length L, tension T, and mass per unit length a is xed at both end and distorted as shown below, where the height of the square pulse is H. Assuming small transverse motion of the string. At t = 0, the string is released from rest. (a) Plot to scale the shape of the string at t = %\\/g. (b) Plot to scale the shape of the string at t = 3\"? (0) Plot to scale the shape of the string at t = L. (d) How often does the initial shape at t = 0 reappear in the string