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.

Note: Leave no cells blank $-$ be certain to enter $"0"$ wherever required.

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

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

P$1-$P$2-$P$3-$P$4-$S$1-$D$2-12-13-14-$V$2$

P$1-$P$2-$P$3-$P$4-$S$1-$D$3-$D$4-11-14-$V$2$

P$1-$P$2-$P$3-$P$4-$S$1-$D$1-$D$4-11-14-$V$2$

P$1-$P$2-$P$3-$P$4-$S$1-$D$2-$D$4-$I$1-14-$V$2$