Compute the unknown values for each of the following cash$-$flow diagrams $($time shown in years and

interest compounded annually$).$

$($a$)$ Figure $8\mathrm{.}32$

$($b$)$ Figure $8\mathrm{.}33$

$($c$)$ Figure $8\mathrm{.}34$

$($d$)$ Figure $8\mathrm{.}35$