Section C Answer One Question Question 4 a) Use the information contained below in Figure Q4 to compress one time unit per move using the least cost method. Reduce the schedule until you reach the crash point of the network. For each move identify what activity(s) was crashed, the adjusted total cost, and explain your choice if you have to choose between activities that cost the same. (18 marks] b) If the indirect costs for each duration are $1,200 for 16 weeks, $1,130 for 15 weeks, $1,000 for 14 weeks, $900 for 13 weeks, $860 for 12 weeks, $820 for 11 weeks, and $790 for 10 weeks, compute the total costs for each duration. Plot these costs on a graph. What is the optimum cost-time schedule? [7 marks] Act. Crash Cost (Slope Maximum Crash Time Normal Time .Normal Cost OO 8888 SO 70 1:40 $680 Time unit 1 week $680 Time unit = 1 week A O Project duration 16 Project Saurien de Total direct costs Figure Q4 -Crash cost and Network diagram [Total 25 Marks) Page 5 of 7 CUARE FIT TO DO SO