a$.$ What is the present value of the following set of cash flows, discounted at $9\mathrm{.}7\%$ per year?

$\backslash$table$[[$Year$,1,2,3,4,],[$CF$,$$$11,$$$21,$$$34,,],[$b$.$ What is the present value of the following set of cash flows, discounted at $9\mathrm{.}7\%$ per year?,,,,,$],[$Year$,1,2,3,4,541],[$CF$,$$$51,$$$41,$$$31,$$$21,5]]$

c$.$ Each set contains the same cash flows $($$$11,$$$21,$$$31,$$$41,$$$51),$ so why is the present value different?

a$.$ What is the present value of the following set of cash flows, discounted at $9\mathrm{.}7\%$ per year?