5. (L &K 9.21) For the regenerative method, show that A = E(Z)/E(N), where a = lim;_x E[Y,]. (Hint: observe that M(n') where n' is the number of regeneration cycles and M(n') is the total number of observations in the n' cycles.) Also show that p(n') := Z(n')/N(n') - pas n' - co w.p.1