What effect does increasing the interest rate have on the present value of an annuity? Does a decrease from 7% to 5% have the same dollar effect as a decrease from 5% to 3%?

For example:(complete the blank)Give you an idea how to anwers

Annuity of $100 for five years at 7%: Present Value is $ _______

Annuity of $100 for five years at 5%: Present Value is $_______

Annuity of $100 for five years at 3%: Present Value is $________

Decrease from 7% to 5%( increases or decrease) __________ PV by $___________

Decrease from 5% to 3% increases PV by $25.02