24. Let X1, X2, . . . be a sequence of nonnegative pairwise independent and identic- ally distributed random numbers with mean EX = / 1 be a subsequence of k = 1,2, .... Show that YB, - EY B, 20. (d) Use the result that if an - a, then - >tax - a to show that EY B - /. Hence, deduce that YB, 25 /. (e) Show that for Bk S n S Bk+1, we have: BK