The Engineering Solutions Company Limited (ESCL) has tendered for, and won a contract to design and build a computerized flood- warning system in Trinidad and Tobago. Consider the activities,...

Extracted text: The Engineering Solutions Company Limited (ESCL) has tendered for, and won a contract to design and build a computerized flood- warning system in Trinidad and Tobago. Consider the activities, durations, and predecessor relationships to roll out this project, in the following network, shown in Table 7 below. Draw the network and answer the questions that follow. ESCL Computerized Flood-Warning System Project Immediate Activity Description Predecessor(s) Time Optimistic Most Likely Pessimistic (Weeks) (Weeks) (Weeks) A 4 1 4 7 --- C A. 2 2 2 D В 1 7 10 D 4 F E 1 2 3 G C 17 H D, G 3 7 11 I D 8 10 J F, H 4 5 K I 1 1 1 a) Using a network, what is the earliest expected time of completion of the whole project? c) Using the information from Table 7, what is the probability that the project can be completed in 28 days? d) Using the information from Table 7, if the project manager wants at least a 98% probability that the project will be completed on or before the due date, what is the shortest project due date that will satisfy the project manager?