Q.4 The owner of a chain of fast-food restaurants is considering a new computer system for accounting and inventory control. A subcontracting IT company sent the following information as shown in Table 4 about the computer system installation. (1) Construct a network diagram with activity on node technique and estimate the expected project completion time and the critical path activities; (ii)lf a 47 days' deadline is imposed, what is the probability that the project will be completed within the specified time limit? [10] [5] (ii) If the owner wants to be 99.8% sure that the project is completed on the schedule date, how many days before should he start the project work? [5] Table 4 Activity Data Precedenc Description Time (days) Activit |y e Pessimistic Optimistic 5 Most likely 7 6 A B C D E A A 4 5 B Select the computer model Design input/output system Design monitoring system Assemble computer Develop the main programs Develop input/ output Create data base Install the system Test and implement 10 15 B 9 15 23 10 8 3 9 14 13 20 31 17 12 4 6 9 G H 1 E D, F G H 4 2 4 5 [Total 25 Marks)