Show formulla in excel

iii) You are looking to save for retirement. You would like to retire in 40 years. You would like to retire with $3 million dollars. How much money would you need to deposit today in order to have $3 million in 40 years if the interest rate is 6.50% ? iv) You are looking to save for retirement. You would like to retire in 20 years. You would like to retire with $3 million dollars. How much money would you need to deposit today in order to have $3 million in 20 years if the interest rate is 6.50%