$($a$)$ Draw the project network. Use activity on node $($A$-$O$-$N$)$ method.

$($b$)$ Calculate the length and variance of the Critical Path.

$($c$)$ Identify the non$-$critical activities! Work out the Total Slack $($TS$)$ and Free Slack $($FS$)$ for

all the non$-$critical activities.

$($d$)$ State whether the network is sensitive or insensitive!

$($e$)$ What is the approximate probability that jobs on the critical path will be completed by the

due date of $($i$)35$ days, $($ii$)41$ days?

$3+1+2+1+5=12$