(b) A maintenance project has the following time estimates and costs for five jobs as given in Table 02. Assume that the jobs can be done either at normal or at fast pace but not at any other pace in between. Assuming a relationship between the job duration and job cost and with overhead cost of $25.00 per hour, what is the optimal Table Q2: Maintenance Project Jobs, Times and Costs October Normal A Crash Cost (5) Predecessor B Cost (5) 80 100 C 40 94 A D 5 100 184 E 5 70 TO2 A 6 50 50 BCD [20 marks] [Total = 25 marks] cost and duration of this maintenance project? Activity Normal Time Crash Time (hours) (hours) 8 6 7 4 12 9 6