Exercise 1.11 Compute the risk (as measured by the standard deviation of the return) involved in purchasing one share with and without the option if a) p = 0.25, b) p = 0.5, c) p = 0.75. Exercise 1.12 Show that the risk (as measured by the standard deviation) of the above strategy involving an option is a half of that when no option is purchased, no matter what the probability 0