You've worked out a line of credit arrangement that allows you to borrow up to $40 million at any time. The interest rate is .615 percent per month. In addition, 5 percent of the amount that yhou borrow must be deposited in a noninterest-bearing account. Assume that your bank uses compound interest on its line-of-credit loans. a. What is the effective annual interest rate on this lending arrangement? b. Suppose you need $15 million today and you repay it in six monts. How much interest will you pay?