Jen is planning to provide for her daughter's future university tuition. For each of the four years of university, she expects to need $15,000 in 15 years, $16,000 in 16 years, $17,000 in 17 years, and $18,000 in 18 years. Jen plans to provide for this by setting aside equal annual end-of-year payments for the next 14 years. If she can earn 5% interest annually, what is the required amount of each payment?