You are planning for an essential plant safety upgrade project using your own people. In your planning. based on your experience, you have assembled the data in the table below: The only way that the outage can be shortened is by using additional resources from contractors and crashing any or all activities where that is possible, but it can be possible at the extra cost as shown in the table below. 2C.1 Draw the network for this job. 2C.2 Mark clearly the critical path. Find the total cost of both methods of completing the work. 2C. 3 What is the optimum duration of the outage at minimum total cost when overheads and other indirect costs of $4500 per day are included? Set out your calculations using the table layout below and show your results with an optimisation chart from a spreadsheet