As the country looked for ways to boost foreign exchange earnings the government took a policy position to promote the manufacturing sector to reduce the reliance on imported goods. Top Marks Enterprises is a recent statup company specializing in the manufacture of automated electronic components. The company invested a lot in developing cutting edge technology to develop quality electronic components which could competeagainst imported products.The company however was less than satisfied with their efficiency levels when asked to manufacture specialist electronic components which were based on the unique design components to clients. They decided to use project scheduling techniques in the manufacture of a special order and the following activity times and relationships were ascertained:

Activity	Description	Immediate Predecessor	Optimistic	Most Probable	Pessimistic
A	Revise designs	-	1	4	7
B	Assemble Components	A	4	8	12
C	Complete rewriting	A	24	25	26
D	Prepare grounding switches	A	30	32	34
E	Apply binding agents	D	10	11	12
F	Install control system	C,D	3	6	9
G	install covers	B,F	3	6	9

Required

1. Calculate the expected time of delivery
2. Construct the network diagram
3. Calculate earliest start and earliest finish times and latest start and finish times for the project.
4. Describe three (3) benefits the company could realize from using PERT/CPM analysis.