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$300 is deposited in account each month for 2 and 1/2 years. The account earns 12% compounded monthly. After this time payments stop.

a. How much will there be in the account when the payments stop?

b. If the accumulated amount is then left for the additional 3 years at the same interest rate, how much will there finally be in the account?

c. How much interest will be earned during the entire period?

Please show your step by step solution.

Thank you.