Please show formulas for execel.

You have just received a windfall from an investment you made in a friend's business. He will be paying you $10,000 at the end of this year, $20,000 at the end of the following year, and $30,000 at the end of the year after that (three years from today). The interest rate is 3.5% per year. a. What is the present value of your windfall? b. What is the future value of your windfall in three years (on the date of the last payment)? Interest rate [ 3.50%] Year Cash flow 2 3 S30,000 S10,000S20,000 a. What is the present vahue of your windfall? Present value b. What is the future value of your windfall in three years (on the date of the last payment)? Future value