Investment $x$ offers to pay you $$4,500$ per year for $9$ years, whereas Investment $Y$ offers to pay you $$6,200$ per year for $5$ years.

a$.$ If the discount rate is $7$ percent, what is the present value of these cash flows?

Note: Do not round intermediate calculations and round your answers to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

b$.$ If the discount rate is $21$ percent, what is the present value of these cash flows?

Note: Do not round intermediate calculations and round your answers to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

$\backslash$table$[[$a$.$ Present value of Investment $x$ at $7$ percent,$],[$Present value of Investment $Y$ at $7$ percent,$],[$b$.$ Present value of Investment $x$ at $21$ percent,$],[$Present value of Investment $Y$ at $21$ percent,$]]$