The time to failure for each of particular standard electronic devices has the density f (x) = 64/x⁵ for x ≥ 2. Show that the corresponding r.v.’s are larger than 2 with probability one. Let T_n be the time to failure for a series of n such devices. Guess to what E{T_n} should converge as n→∞. Find E{T_n} and check your guess.