Variable Interest Rates a 15-year annuity pays $1,500 per month, and payments are made at the end

Question:

Variable Interest Rates a 15-year annuity pays $1,500 per month, and payments are made at the end of each month. If the interest rate is 13 percent compounded monthly for the first seven years, and 10 percent compounded monthly thereafter, what is the present value of the annuity?

Annuity
An annuity is a series of equal payment made at equal intervals during a period of time. In other words annuity is a contract between insurer and insurance company in which insurer make a lump-sum payment or a series of payment and, in return,...