You have been given the information in Exhibit $4\mathrm{.}13.$ 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 subproject $"S"$ supplier specifications.

These involve engineering details for how the product will perform.

These involve engineering details for how the product will perform.

The individual components that make up the product are the fo components together, and a working prototype is built and tested.

Finally, in subproject $"V"$ suppliers are selected and contracts are negotiated.

Exhibit $4\mathrm{.}13$: Work Breakdown Structure and Activities for the Cell Phone Design Project

a$.$ Calculate the start and finish times for each activity. $($Leave no cells blank $-$ be certain to enter $"0"$ wherever

required.$)$

b$.$ Determine the minimum number of weeks for completing the project.

Minimum number of

weeks

c$.$ Find the activities that are on the critical path for completing the project in the shortest time.