i need the answer to this question asap as its due in 1 hour

Question 8 of 10 The Kucharskis have decided to invest in a college fund for their young son. They invested $20,000 in a deferred annuity that will pay their son at the beginning of every month for 4 years, while he goes to college. If the account earns 2.50% compounded monthly and the annuity payments are deferred for 13 years, what will be the size of the monthly payments? Round to the nearest cent