Problem $3[30$ pts$]$

Consider the following two$-$week $(10$ working days$)$ computer training class:

Given the following.

Here activity B requires A and D cant starts before completing C$.$ Both $B$ and D are also necessary

to be completed for activity $E_{?}$ to be performed. The duration of these activities arse given in the

table above under column 'normal time'.

a$)$ Construct the network and find the critical path while showing $E{S}_5,LSs,EF5,$LEs, and

slacks for all activities.

b$)$ Find the crash cost per day for each activity

c$)$ Which activity $($ias$)$ should be crashed to meet a project deadline of $10$ days with a

minimum coat? Assume partial crashing.

d$)$ Find the new cost.

e$)$ Is partial crashing an appropriate assumption in this kind of project?