Consulting has a small accounting project and the details (activities, predecessors, duration, crash costs) are given in the table.

Activity	Immediate Predecessor	Duration (Days)	Crash Cost/day ($)
A	B, C	1	300
B	E	1	100
C	F	4	200
E	F	2	100
F	-	2	400

a) Develop a network for this project.

b) Determine the critical path and the project completion time.

c) Activities can be crashed down to zero days. Each day crashed is worth $250 for the firm. Which activities should the firm crash and what is the total crashing cost?