At the top of the next page are the required activities of the fire protection bid package of the building project referred to in Problem 18, including their expected duration (in working days) and their immediate predecessor(s). Draw the precedence network. Calculate the earliest start, earliest finish, latest finish, and latest start times. What is the fire protection bid package duration? Name the critical activities.

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Duration F Finalize design E 25 Activity Description Precedes (days) G Install pipe support F 60 A Invite bids 37 Procure pipes F 35 B Award contract A 22 Procure equipment F 100 Preliminary design and B 110 Install pipes H 130 revision K Install equipment 100 D Detailed drawing B 60 Test system G, J, K 160 Final owner review C, D 15