Please explain the excel function uesed

Question 1: a) Suppose that we want to have a yearly income of $60,000 in retirement. We expect to live 25 years in retirement and our inflation-adjusted rate of return on our safe investment is 6%. How much money do we need to have saved in order to have this consistent income? Show your work. (11 points) N PV FV I/Y PMT b) How much money do we need to have saved if the inflation-adjusted rate of return on our safe investment is 3% in order to have the same consistent income? Show your work. (11 points) 1/Y PV PMT FV c) What role does inflation play in the amount of money that people need to save for retirement? (6 points)