b$.$ L$4$L$,$ complete the last three rows

$\backslash$begin$\{$tabular$\}\{|$l$|$l$|$l$|$l$|$l$|$l$|$l$|$l$|$l$|\}$

$\backslash$hline $\backslash$multicolumn$\{4\}\{|$l$|\}\{$Item: Rotor assembly$\}$ & $\backslash$multicolumn$\{3\}\{|$r$|\}\{$Lot Size: Lead Time:$\}$ & $\backslash$multicolumn$\{2\}\{|$c$|\}\{$L$4$L $2$ weeks$\}\backslash \backslash$

$\backslash$hline Week & $1$ & $2$ & $3$ & $4$ & $5$ & $6$ & $7$ & $8\backslash \backslash$

$\backslash$hline Gross requirements & $65$ & $15$ & $45$ & $40$ & $80$ & $80$ & $80$ & $80\backslash \backslash$

$\backslash$hline Scheduled receipts & $150$ & & & & & & & $\backslash \backslash$

$\backslash$hline $\backslash$multicolumn$\{9\}\{|$l$|\}\{$Projected on hand $20\}\backslash \backslash$

$\backslash$hline $\backslash$multicolumn$\{9\}\{|$l$|\}\{\backslash$multirow$\{2\}\{*\}\{$Planned receipts Planned order releases$\}\}\backslash \backslash$

$\backslash$hline & & & & & & & & $\backslash \backslash$

$\backslash$hline

$\backslash$end$\{$tabular$\}$