PART II Solve a combination of problems for a total of 70 points only. Show all your work for full credit. 1. You purchase a 20-year, $1,000 bond with a coupon rate of 7 percent paid annually with a margin requirement of 40 percent. a. What would be your rate of return if the interest rates decreased, immediately after purchase, to 6 percent? b. What would be your rate of return if the interest rates increased, immediately after purchase, to 8 percent? (20 Points)