The table below provides cost and time estimates of the seven activities of a project.

Activity i-j	Time Estimates (Weeks)	Time Estimates (Weeks)	Direct Cost Estimate (KSHs. in 000)	Direct Cost Estimate Crash Cost (KSHs. in 000)
1-2	2	1	10	15
1-3	8	5	15	21
2-4	4	3	20	24
3-4	1	1	7	7
3-5	2	1	8	15
4-6	5	3	10	16
5-6	6	2	12	36

i. Draw the project network corresponding to normal time.

ii. Determine the critical path and the normal duration and the normal costs of the project.

iii. Crash the activities so that the project completion time reduces to 9 weeks, with minimum additional cost.