Please Answer both part A and B: You have just received a windfall from an investment you made in a$$ friend's business. She will be paying you $$$$10,000$ at the end of this$$ year, $$$$20,000$ at the end of next$$ year, and $$$$30,000$ at the end of the year after that $(3$ years from$$ today$).$ The interest rate is $7\mathrm{.}7\%$ per year.

a$.$ What is the present value of your$$ windfall?

b$.$ What is the future value of your windfall in $3$ years$($on the date of the last$$ payment$)?$