Given the present value of an ordinary annuity and the applicable required return, how can this value

Question:

Given the present value of an ordinary and the applicable required return, how can this value be easily converted into the present value of an 8. Otherwise identical due? What is the fundamental difference between the cash flow streams of these two annuities?
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,...