Please refer to the attachment.
One new engineering team is put together for the development of a new product. This new product will be built through an assembly line. The production manager designs the assembly line. He has been advised that the assembly line must be ready in four weeks (20 working days) for a test run. The manager decided to use CPM (critical path method) and has broken down the projects into the following activities, determined their precedence relationships, and estimated normal times: