Given the following project (all times are in days): (a) Draw the network and find the critical path, time, and cost for an all-normal level of project activity. (b) Calculate the crash cost-per-day (all activities may be partially crashed). (c) Find the optimal way of getting an 18-day delivery time. What is the project cost? (d) Find the optimal way of getting a 16 -day delivery time. What is the project cost? (e) Calculate the shortest delivery time for the project. What is the cost?