Problem 3 [30 pts] Consider the following two-week ( 10 working days) computer training class: Given the following. Here activity B requires A and D cant starts before completing C. Both B and D are also necessary to be completed for activity E to be performed. The duration of these activities are given in the table above under column 'normal time'. a) Construct the network and find the critical path while showing ESs, LSs, EFs, LFs, and slacks for all activities. [10] b) Find the crash cost per day for each activity [5] c) Which activity (ies) should be crashed to meet a project deadline of 10 days with a minimum cost? Assume partial crashing. [5] d) Find the new cost. [5] e) Is partial crashing an appropriate assumption in this kind of project? [5]