$3\mathrm{.}8$ Look again at Table $3\mathrm{.}3$ and Figure $3\mathrm{.}5$ in this chapter. Find lead$-$time replacement, deliv. ery, and MOOP unit material costs for the following adjustments to Figure $3\mathrm{.}5.$

$($a$)$ For just the $JJ(t)$ changes in the table below.

$($b$)$ For TU $(t)$ changes.

$($c$)$ For TS $(t)$ changes.

$($d$)$ For the combined changes.

$\backslash$table$[[$Period$,JJ(t),TU(t),TS(t)$