Using PMT from the excel functions calculate your monthly payment amount if you were to pay a 26000 loan off in 5 years, 10 years? the rate will be 10%

To become a millionaire at the age of 70, how much money will you have to invest now with an interest rate of 5 percent? Hint: Calculate the time period (70 - your age) and use PV. (age 25)#

Please explain on excel thank you!