Suppose you are going to receive $$15,000$ per year for $6$ years. The appropriate interest rate is $7$ percent.

a$.$

What is the present value of the payments if they are in the form of an ordinary annuity?

b$.$ What is the present value if the

payments are an annuity due?

C$.$ Suppose you plan to invest the payments for $6$ years, what is the future value if the payments are an ordinary annuity?

D$.$ Suppose you plan to invest the payments for $6$ years, what is the future value if the payments are an annuity due?