(5 points) Define
Sn = Vn Sn- n/a = 1/Vn ∑ n=1 Xt - u/a
where o2 = Var(X1). Generate 10 independent realizations of {Ŝn, n = 1,2, ..., k}, k = 104, and plot them on the same figure using different colors, as done in the previous step.