When would an ordinary annuity consisting of monthly payments of $200 at 5% compounded monthly be worth

Question:

When would an ordinary consisting of monthly payments of $200 at 5% compounded monthly be worth more than a principal of $10,000 invested at 7.5% compounded monthly?
In Problem, use graphical approximation techniques to answer the question.
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,...