Question $1$: The task time estimates for a production line setup project at Robert Klassen$$s

Ontario factory are as follows:

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

A $6\mathrm{.}0-$

B $7\mathrm{.}2-$

C $5\mathrm{.}0$ A

D $6\mathrm{.}0$ B$,$ C

E $4\mathrm{.}5$ B$,$ C

F $7\mathrm{.}7$ D

G $4\mathrm{.}0$ E$,$ F

a$)$ Draw the project network using AON.

b$)$ Identify the critical path.

c$)$ What is the expected project length?