I'm stuck at B

$18,000 deposit is made into an account with an APR of 3.5%, compounded continuously. a. Compute the balance in the account after 1,5, and 20 years. (Simplify your answers and roun the nearest cent.) The balance in the account after 1 year is The balance in the account after 5 years is The balance in the account after 20 years is b. The APY for the account is (Simplify your answer and round to two decimal places.)