Given the following project (all times are in days): Pre- Normal Normal Crash Crash Activity decessor Time Cost Time Cost a 5 $50 3 $150 b 4 40 2 200 C b 7 70 6 160 a.c 2 20 50 a.c 3 30 b 8 80 5 290 d 5 50 4 100 e, f 6 60 3. 180 All activities, except for activity b, may be partially crashed.(i.e. partial crashing for activity b only, is not allowed.) Each of the following sections is 5 marks. 1. Draw the network and find the critical path, time, and total cost for an all-normal level of project activity. (6 marks) 2. If the project indirect cost is $85/day, what is the optimal completion time and the corresponding total cost? (9 marks)