Refer to Figure 8.15, which shows the sensitivity report for Problem 7.
a. How much would the return for U.S. Oil have to increase before it would be beneficial to increase the investment in this stock?
b. How much would the return for Huber Steel have to decrease before it would be beneficial to reduce the investment in this stock?
c. How much would the total annual return be reduced if the U.S. Oil maximum were reduced to 900 shares?