Activity	Immediate Predecessor	Normal Time (days)	Normal Cost ($)	Crash Time (days)	Cost Slope
A	-	3	50	2	50
B	-	6	140	4	60
C	-	2	50	1	30
D	A	5	100	3	40
E	C	2	55	2	-
F	A	7	115	5	30
G	B, D	4	100	2	70

Assume the indirect costs to be as follows:

Project Duration (days)	12	11	10	9	8	7
Indirect Costs (dollars)	900	820	740	700	660	620

(a) Determine the initial project duration, project cost and critical path?

(b) Find the optimum cost time schedule for the above project.