=+22.6. If X1, X2 ,... are independent and identically distributed, and if P[X, 2 0] = 1 and P[X] > 0] > 0, then E ,, X ,, = > with probability 1. Deduce this from Theorem 22.1 and its corollary and also directly: find a positive € such that X„ > c infinitely often with probability 1.