How much will it cost Hitomi to purchase a two-level retirement annuity that will pay $5000 at

Question:

How much will it cost Hitomi to purchase a two-level retirement that will pay $5000 at the end of each month for the first 10 years, and $7000 per month for the following 15 years? The payments include a rate of return to Hitomi of 3% compounded monthly.
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,...