2-17. In each annuity example, we've assumed that our term length coincides with the compounding period. Generalize the formula for an ordinary annuity as follows: (a) Suppose the payment R is made t-times annually, compounding 2t times per year. (b) Suppose the payment R is made t-times annually, compounding kt times per year, for some positive number k. (c) Suppose the payment R is made t-times annually, compounding continuously. 2-17. In each annuity example, we've assumed that our term length coincides with the compounding period. Generalize the formula for an ordinary annuity as follows: (a) Suppose the payment R is made t-times annually, compounding 2t times per year. (b) Suppose the payment R is made t-times annually, compounding kt times per year, for some positive number k. (c) Suppose the payment R is made t-times annually, compounding continuously