How large will those monthly payments be when she is in college over the next 3 years?

. Mr. Donald Trump is saving up to support his daughter's college education. He has decided to deposit $550 per month for 18 years. Then his daughter will go to college and receive monthly payments for an expected 3 years. If rates are assumed to be 5% compounded quarterly, how large will those monthly payments be when she is in college over the 3 years? Total timeline is 21 years