The Bender Construction Co. is involved in constructing municipal buildings and other structures that are used primarily by city and state municipalities. This requires developing legal documents, drafting feasibility studies, obtaining bond ratings, and so forth. Recently, Bender was given a request to submit a proposal for the construction of a municipal building.
The first step is to develop legal documents and to perform all steps necessary before the construction contract is signed. This requires more than 20 separate activities that must be completed. These activities, their immediate predecessors, and time requirements are given in Table 12.10 on the next page.
As you can see, optimistic (a), most likely (m), and pessimistic (b) time estimates have been given for all of the activities described in the table. Using the data, determine the total project completion time for this preliminary step, the critical path, and slack time for all activitiesinvolved.

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TIME REQUIRED (WEEKS) ACTIVITY DESCRIPTION OF ACTIVITY IMMEDIATE PREDECESSORS Draft of legal documents Preparation of financial statements Draft of history Draft demand portion of feasibility study Review Review and approval of history Review of feasibility study Draft final financial portion of feasibility study Draft facts relevant to the bond transaction Review and approval of financial statements Receive firm price of project Review and completion of financial portion of and approval of legal documents 6 18 26 feasibility study Completion of draft statement All material sent to bond rating services Statement printed and distributed to all 6,9, 10, 12 13 14 13 10 16 15 16 17 18 19 interested parties Presentation to bond rating services Bond rating received Marketing of bonds Purchase contract executed Final statement authorized and completed Purchase contract 16 15, 17 18 19 19 20 21, 22 16 21 .1 2 Bond proceeds available Sign construction contract