Compute the present value of a $ 100 annual annuity for the same combination of rates and

Question:

Compute the present value of a $ 100 annual for the same combination of rates and time periods as in problem l.
a. r = 8%, t = 10 years
b. r = 8%, t = 20 years
c. r = 4%, t = 10 years
d. r = 4%, t = 20 years
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,...