$D_{(1)}$

$F_{(2)}$

$E_{(2)}$

$F_{(3)}$

$D_{(2)}$

$E_{(1)}$

b$)$ Choose the correct time$-$phased structure.

A$.$

B$.$

C$.$

D$.$

c$)$ Develop a net material requirements plan for $F($enter your responses as whole numbers$).$

$\backslash$table$[[$Item$,,$Week,$\backslash$table$[[$Lead Time$],[($weeks$)]]],[,1,2,3,4,5,6,7,8],[F,$Gross req,,,,,,,,,$2],[,$On hand,,,,,,,,$],[,$Net req,,,,,,,,$],[,$Order receipt,,,,,,,,$],[,$Order release,,,,,,,,$]]$

$3$ is labeled F and placed below B$.$ C has $2$ branches, labeled D and E$.$ A horizontal line segment from $1$ to $3$ is labeled D and placed above $C.$ A horizontal line segment from $1$ to $3$ is labeled $E$ and placed below $C.$