Mary Poppins deposits $1,600 at the end of each quarter for 30 years into an account paying 10% compounded quarterly. (a) How much money is in Mary's account after 5 years? (Round your answer to the nearest cent.) $ (b) How much money is in Mary's account after 6 years? (Round your answer to the nearest cent.) $ (c) How much money interest does Mary earns during the 6th year (from year 5 to year 6)? $