Construct a network for this problem.

Case Study: Westin Contractors William Purvis looked across his desk at the company's latest management recruit and said, 'Welcome to Westin Contractors. This is a good company to work for and I hope you settle in and will be very happy here. Everyone working for Westin has to be familiar with our basic tools, so you should start by looking at network analysis. Here is a small project we have just costed - I have to give the customer some details about schedules, workloads and budgets by the end of the week. I would like a couple of alternative views with your recommendation of the best. Everything you need is available in the office so don't be afraid to ask for help and advice.' William Purvis supplied the following data and said that there is a penalty cost of BD 3,500 for every week the project finished after week 28. Activity | Preceding Activity A B D E F BE G H D,F,G Times of Completion (in weeks) Optimistic Most Likely Pessimistic 1 3 4 3 5.5 9 4 7 8 4 8.5 10 2 3.5 9 2 3 5 6 9 16 2 3 5