What is the present value of the following set of cash$$ flows, LOADING...$,$ discounted at $9\mathrm{.}9\%$ per$$ year?

b$.$ What is the present value of the following set of cash$$ flows, LOADING...$,$ discounted at $9\mathrm{.}9\%$ per$$ year?

c$.$ Each set contains the same cash flows $($$$9,$$$21,$$$33,$$$45,$$$57),$ so why is the present value$$ different?