please answer abcd

Sabrinder Kaur is moving into a rental house near the USM campus at the beginning of the new semester with three friends. Each of the four friends will have a bedroom that they can redecorate as they wish. Sabrinder wants to walipaper her room and put down a new carpet, and she has identified the following activities and the times they will take to complete the project before the term starts. (a) Construct the PERT/CPM network for this project and identify the project's expected completion time and its critical path. [15 masrks] (b) Explain if activities E and G can be performed simultaneously without defaying the minimum project completion time. [3marks] (c) Explain if one person can perform A,G3 and I without delaying the project. [3 marks] (d) Explain how much the project would be delayed if activity G was delayed by seven hours and activity L was distayed by four hours