Problem 4 A company is introducing a new system for interoffice communication. The following table provides the activities that must be accomplished to complete the new office system project. Use the following relevant information about the activities' times and costs. a. Construct the project's network. Under normal time, what are the project's duration; project total cost; and the critical path? b. Calculate the crashing cost per week for each activity c. If the goal is to complete the project in 36 weeks, which activitics should we crash and by how much and what will be the minimum total cost? Show all the steps