Bradshaw Construction is involved in constructing municipal buildings and other structures that are used primarily by city and state municipalities. The construction process involves developing legal documents, drafting feasibility studies, obtaining bond ratings, and so forth. Recently, Bradshaw 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 optimistic (a), most likely (m), and pessimistic (b) time estimates are given in the table on the next page.
Determine the total project completion time for this preliminary step, the critical path, and slack time for all activities involved.

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WEEKS ACTIVITY a DESCRIPTION OF ACTIVITY IMMEDIATE PREDECESSORS Draft legal documents Prepare financial statements Draft history Draft demand portion of feasibility study Review and approval of legal documents Review and approval of history Review feasibility study Draft final financial portion of feasibility study Draft facts relevant to the bond transaction Revicw Receive firm price of project Review and complete financial portion of feasibility study Complete draft statement Send all materials to bond rating services Print statement and distributed it to all interested parties Make presentation to bond rating scrvices Rcceive bond rating Market bonds 10 and approve financial statements 18 12 13 6,9, 10,1, 12 0.25 0.50 0.75 15 16 17 18 19 0.20 0.30 0.40 14 16 15, 17 0.10 0.20 0.30 Execute purchase contract 0.10 0.15 0.50 Authorize and complete final statement 19 19 20 21, 22 21 Purchase contract 0.20 0.50 080 Make bond procceds available 0.20 0.40 Sign construction contract