Joey chose to invest his money in an account that pays 2.3% annual interest compounded monthly. Joeys initial investment was $100. Each month after the first deposit, he deposits another $100. Joey wants to know how much money he has after the first month.

a.) how much interest would he earn the first month

b.) since Joey makes a deposit of $100 at the start of the second month, what is the balance after that deposit is made ?