Passage times and a band

For the spread of Problem 13A.7, consider the cycle strategy with $a = \hat\theta - 0.02$, $m = \hat\theta + 0.02$ and round-trip cost $c = 0.003$. (a) Compute the expected cycle length in trading days from (13A.28). (b) Compute the expected time from $a$ to $m$ and from $m$ back to the mean $\hat\theta$, using (13A.27). (c) Compute the expected profit per year in spread units.