Need all 3 of these done ASAP! Thanks you!

Upon graduation from college, Warren Roberge was able to defer payment on his $45,000 student loan for 6 months. Since the interest will no longer be paid on his behalf, it will be added to the principal until payments begin. If the interest is 5.82% compounded monthly, what will the principal amount be when he must begin repaying his loan? What is N in this problem? A. The number of payments. B. The number of years. C. The number of compounds per year. D. The number of months. The principal amount will be $ (Do not round until the final answer. Then round to the nearest cent as needed.) Find the interest rate needed for the sinking fund to reach the required amount. Assume that the compounding period is the same as the payment period. (Note. A sinking fund is an account created to fund a future expense. It's like a savings account) $16,394 to be accumulated in 4 years; quarterly payments of $900 The interest rate needed is approximately %. (Type an integer or decimal rounded to two decimal places as needed.) Find the effective rate for a payday loan which charges $63.55 for a two week loan of $480. The effective rate of the loan is percent. (Round to two decimal places.)