$2.$ Draw the node network, perform the CPM calculations, mark the critical path, and complete the table below:

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

$\backslash$hline Activity & Duration & IPA & Lag & ES & EF & LS & LF & TF $\backslash \backslash$

$\backslash$hline A & $4$ & $-$ & & & & & & $\backslash \backslash$

$\backslash$hline B & $7$ & A & & & & & & $\backslash \backslash$

$\backslash$hline C & $5$ & A & $3$ & & & & & $\backslash \backslash$

$\backslash$hline D & $8$ & A & & & & & & $\backslash \backslash$

$\backslash$hline E & $11$ & B & & & & & & $\backslash \backslash$

$\backslash$hline F & $9$ & B & $2$ & & & & & $\backslash \backslash$

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

$\backslash$hline G & $7$ & C & & & & & & $\backslash \backslash$

$\backslash$hline H & $9$ & C & & & & & & $\backslash \backslash$

$\backslash$hline & & D & $4$ & & & & & $\backslash \backslash$

$\backslash$hline I & $4$ & D & & & & & & $\backslash \backslash$

$\backslash$hline J & $10$ & E$,$ G & & & & & & $\backslash \backslash$

$\backslash$hline & & F & $2$ & & & & & $\backslash \backslash$

$\backslash$hline K & $4$ & F$,$ G$,$ H & & & & & & $\backslash \backslash$

$\backslash$hline L & $2$ & H & $3$ & & & & & $\backslash \backslash$

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

$\backslash$hline M & $3$ & K$,$ L & & & & & & $\backslash \backslash$

$\backslash$hline

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