22,938 is what he should pay for the annuity.
Given;
Pv = 5000
r = 4.5
n = 5
Formula of Annuity payment is; P = r(PV) / 1 - (1 + r)^-n
= 5000 * 0.045 / 1 - (1+0.045)^-5
= 22,938
Just follow the formula of the annuity payment and you can get the final answer you are looking for. The answer in this question is $22,938