Task time estimates for a production line setup project at Kitimat LPG factory beginning during the fourth $(4)$ week are as follows:

Activity Time $($in hours$)$ Immediate Predecessors

A $16\mathrm{.}0-$

B $17\mathrm{.}2-$

C $15\mathrm{.}0$ A

D $16\mathrm{.}0$ B$,$ C

E $14\mathrm{.}5$ B$,$ C

F $17\mathrm{.}7$ D

G $14\mathrm{.}0$ E$,$ F

a$)$ Draw the project network using Activity on the Node $($AON$).$

b$)$ Determine the ES$,$ EF$,$ LS$,$ LF and the slack for each activity.

c$)$ What is the expected project length?

d$)$ Identify the critical path.

e$)$ Using the information draw a Gantt chart for the project.