Based on your worksheet calculations, answer the questions below.

Question $4$a

The critical path$($s$)$

$1-3-6-7$

$1-2-5-7$

$1-2-4-5-7$

$1-3-4-5-7$

$1-2-4-6-7$

$1-3-4-6-7$

The project duration is $$ weeks.

Question $4$b $($On Crash options, only select those which are actually available.$)$

Crash $1$ Options $($Uncheck every box to remove the question mark and then check all that apply.$)$

$?1-2$