An electrical contracting company has been awarded a government contract to install lighting fixtures on a major highway. They want to use a horizontal bar chart to plan the schedule for the contract with work to begin on January 1 and assuming four weeks per month. The company has established the following project activities, their precedence relationships, and their estimated durations: Immediate Duration Activity a. order materials Predecessors (weeks) 4 b. clear job sites c. excavate job sites d. make trenches for conduit e. install conduit f. form and pour foundations g. install wire h. install lighting standards j. install luminaries j. connect to service 6. 10 b 6 10 8 f 6. 5 h 4 3 a) Perform the AON network and support your answer with relevant analysis and computation. b) When does activity "d" begin? c) When does activity "f" end? d) When is the optimum duration for this project to be completed? Justify your answer e) Identify the critical activity for the project. f) Identify the critical path. g) Although the PERT or CPM network or analysis is prepared, but you are required to speed up the completion of the project. How do you decide on the activities to complete the project sooner? Justify your answer.