2. Let B1, B2, ... be iid Ber(p) and Xn+1 = Xn + 2Bn -1, n =1,2, ... with Xo = a. Simulate 10' replications of the stopping time: T = min {n : Xn = bor Xn = 0}, and then plot a histogram of its distribution. Experiment with different values of a E [-10, 10] and be [-10, 10]