Finally, with (left(I_{n} ight)) as in Exercise 11 and (N_{t}) equal to the sum of the (I)

Finally, with \(\left(I_{n}\right)\) as in Exercise 11 and \(N_{t}\) equal to the sum of the \(I\) 's through \(t\), appeal to the Renewal Law of Large Numbers to establish part (e) of Theorem 1 of Section 4.5 .