PLZ help me out, I will hit the THUMB UP for you!!!

Alex has a son who is currently 12 years old. He will be going to college in 6 years. Alex would like to have $100,000 in a savings account to fund his education at that time.

Required

1. If the account promises to pay a fixed interest rate of 4% per year, how much money does Alex need to put into the account today to ensure that he will have $100,000 in 6 years?

Alex has the opportunity to invest in a scheme which will pay $10,000 at the end of each of the next 5 years. He must invest $20,000 at the start of the first year and an additional $23,000 at the end of the first year.

Required

2. How does the valuation principal help Alex make decision?
3. What is the net present value of this investment if the interest rate is 3%