Totally stuck with this chapter. Any help with A thru F would be greatly appreciated!!

You work for a company that makes cell phones and have been made project manager for the design of a new cell phone. Your supervisors have already scoped the project, so you have a list showing the work breakdown structure, and this includes major project activities. You must plan the project schedule and calculate project duration. You have been given the information in Table-1 below. It includes all the activities required in the project and the duration of each activity. Also, dependencies between the activities have been identified. Remember that the preceding activity must be fully completed before work on the following activity can be started. Your project is divided into five major subprojects. Subproject P involves developing specifications for the new cell phone. Here, decisions related to such things as battery life, size of the phone, and features need to be made. These details are based on how a customer uses the cell phone. These user specifications are redefined in terms that have meaning to the subcontractors that will actually make the new cell phone in subprojects supplier specifications. These involve engineering details for how the product will perform. The individual components that make up the product are the focus of subproject D. Subproject I brings all the components together, and a working prototype is built and tested. Finally, in subproject V, suppliers are selected and contracts are negotiated. ACTIVITY IDENTIFICATION DEPENDENCY DURATION (WEEKS) MAJOR SUBPROIECTS/ACTIVITIES Product specifications (P) Market research Overall product specifications Hardware Software Supplier specifications (S) Hardware Software SEE Product design (D) Battery Display Camera Outer cover DI, D2, D3 Product integration (1) = D4 Hardware User Interface Software coding Prototype testing D2 12 11.13 Subcontracting (V) SI, S2 Suppliers selection Contract negotiation S iation 14. VI a) Draw a project network that includes all the activities with times. (20 points) b) Calculate the early and late times for each activity. List those in a table. (20 points) c) List all the paths in the network. (6 points). d) Identify the activities that are on the critical path for completing the project in the shortest time. (4 points) e) Determine the minimum number of weeks for completing the project. (5 points) f) Identify slack in the activities that are not on the critical path. (5 points)