please help with these problems and pleause use Excel program to work out problems. please show all formulas and calculations. thank you.

8. Suppose you have $50,000 in your retirement fund and you'll be saving $15,000 per year at the end of the year for the next 40 years. How much will you have in your fund when you retire if your return is 12% per year. 9. Now reconsider Problem 8. This time assume that the returns have a mean of 12% and a standard deviation of 10%. Use a Monte Carlo simulation to estimate how much you will have in the fund in 40 years