Briefly describe how to solve for the interest rate or the time period in annuity problems.

Question:

Briefly describe how to solve for the interest rate or the time period in problems.
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,...