A large renovation of the Hard Rock casino has six activities (in weeks). The estimated times and immediate predecessors are given in the following table (a=Optimistic, m=most likely, b= pessimistic times). Assume that the activity times are independent:

		Time
Activity	Immediate predecessor(s)	a	m	b
A	-	11	15	19
B	-	27	31	41
C	-	18	18	18
D	A,B	9	10	11
E	C	5	8	11
F	D,E	16	19	22

a) Determine the total expected project completion time.

b) What is the critical path of the project?

Select one:

a) 42 weeks; b) C-E-F

a) 59 weeks; b) A-D-F

a) 61 weeks; b) B-D-F

a)61 weeks; b) A-B-D-F