need help on e,f,g - please

a Demo Completo The Farmer's American Bank of Leesburg is planning to install a new computerized accounts system Bank management has determined the activities required to complete the project the precedence relationships of the activities, and activity time estimates, as shown in the following table: Time Estimates (weeks) Activity Activity Activity Description Predecessor a b A Position recruiting 5 8 17 B System development 3 12 15 System training 4 7 10 D Equipment training A 5 8 23 E Manual system test B,C 1 1 1 F Preliminary system changeover B.C 1 4 13 G Computer personnel interface DE 3 6 9 H Equipment modification 1 25 7 1 Equipment testing H 1 1 1 J System debugging and installation FG 2 2 2 K Equipment changeover G 5 11 DE 8 a. Using the PERT approach use the three estimates of duration to calculate a mean duration and standard deviation for all activities. (4 pts) 6:35 PM a. Using the PERT approach, use the three estimates of duration to calculate a mean duration and standard deviation for all activities. (4 pts) b. Construct/draw a network diagram for this problem using the mean durations, calculate LS(Foll), ES(Prec.), and the total float for each task, and hence identify the critical path. What is the standard deviation of the critical path? (24 pts) c. What is the 94% confidence interval for the length of the critical path? (4 pts) d. What is the probability of completing the project within 40 weeks? (4 pts) e. Answer the project manager's question: "want to tell the client a project length which I am 89.44% sure that we can meet what figure should I give them? (4 pts) 1. What is the probability of completing the project between 35 and 39 weeks? (4 pts) The following tablo provides the crash data for the network project described above Activity Time Tin Wenke Activity Cost ($) a f. What is the probability of completing the project between 35 and 39 weeks? (4 pts) g. The following table provides the crash data for the network project described above. Activity Time (in Weeks) Activity Cost ($) Activity Normal time Crash time Normal cost Crash cost 9 7 4,800 6,300 b 11 9 9,100 15,500 7 5 3,000 4.000 d 10 8 3,600 5,000 1 1 0 0 f 5 3 1,500 2,000 9 6 5 1,800 2,000 h 3 3 0 0 i 1 1 0 0 j 2 2 0 0 k 8 6 5,000 7,000 Crash the network to 26 weeks. Indicate how much it would cost the bank and then indicate the critical path. (6 pts e ON