n order to accumulate $4, 000, you will deposit $100 at the end of each month for as long as necessary. Interest is 12% compounded monthly. (a) Find the number of regular payments and the fractional period that are required to accumulate the $4, 000? (b) If a final fractional payment will be added to the last regular payment, what must this fractional payment be? (c) If a final fractional payment will be made one month after the last regular pay- ment, what must this fractional payment be? (d) If the fractional payment to be made during the month following the last regular payment.