someone please help me

A project has the following activities, with specified precedents and expected durations in hours). What is the expected project duration? Activity Precedent Duration A 6.0 B 7.2 c A A 5.2 D D B,C 6,0 E E B, C 4,5 F D 7.7 OR G EF 4,0 Answer: 40.6 A project has the following activities with specified precedents and expected durations on hours). How much slack does Activity Ehave? Activity Precedent Duration 6.0 B 72 C 02 5.2 D B, C 6.0 E B. 4.5 F 7.7 G EF 4.0 Answer: 124