please help and make it simple :')

Office Automation, Inc., developed a proposal for introducing a new computerized office system that will standardize the electronic archiving of invoices for a particular company. Contained in the proposal is a list of activities that must be accomplished to complete the new office system project. Use the following relevant information about the activities. Time (weeks) ) Cost ($1000s) ($ Activity Description Immediate Predecessor Normal Crash Normal Crash A Plan needs 10 8 30 70 B Order equipment A 8 6 120 150 Install equipment B 10 7 100 160 D Set up training lab A 7 6 40 50 E Conduct training course D 10 8 50 75 F Test system C, E 3 3 60 (a) Develop a project network. (Submit a file with a maximum size of 1 MB.) Choose File No file chosen This answer has not been graded yet. (b) Develop an activity schedule. Activity Earliest Start Latest Start Earliest Finish Latest Finish Slack A 0 0 0 10 10 0 0 B 10 10 20 X 20 X 0 C 20 x 20 1x X 30 x 30 x 0 D 10 12 X 18 x 20 IX 2 X E E 18 1x 20 x 28 X 30 X 2 X F 30 X X 30 X 33 X 33 x 0 0 (c) What are the critical activities? (Enter your answers as a comma-separated list.) A,B,C.F What is the expected project completion time (in weeks)? 33 x weeks (d) Assume that the company wants to complete the project in six months or 26 weeks. What is the amount of crash time (in weeks) for each activity that minimizes cost? (A, B, C, D, E) = (e) Develop an activity schedule for the crashed project. Activity Earliest Start Latest Start Earliest Finish Latest Finish Slack A 0 0 O 8 8 O B 8 8 14 14 0 0 14 14 21 8 X 0 0 D 8 8 14 XX 14 0 E 14 14 22 x 22 1x 0 F F 22 x 0 (f) What added project cost (in thousands of dollars) is required to meet the six-month completion time? 152500 X thousands of dollars