A check-cashing store is in the business of making personal loans to walk-up customers. The store makes only one-week loans at 7.2 percent interest per week. a. What APR must the store report to its customers? What EAR are customers actually paying? (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) Annual percentage rate % Effective annual rate % b. Now suppose the store makes one-week loans at 7.2 percent discount interest per week. Whats the APR now? The EAR? (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) Annual percentage rate % Effective annual rate % c. The check-cashing store also makes one-month add-on interest loans at 7.2 percent discount interest per week. Thus if you borrow $80 for one month (four weeks), the interest will be ($80 1.0724 ) $80 = $25.65. Because this is discount interest, your net loan proceeds today will be $54.35. You must then repay the store $80 at the end of the month. To help you out, though, the store lets you pay off this $80 in installments of $20 per week. What is the APR of this loan? What is the EAR? (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) Annual percentage rate % Effective annual rate %