The following information is known about a project to upgrade a point-of-sale system at Kids and Tots Apparel: \begin{tabular}{ccc} \hline Activity & Activity Time (days) & Immediate Predecessor(s) \\ \hline A & 7 & - \\ B & 5 & A \\ C & 3 & A \\ D & 5 & B,C \\ E & 4 & D \\ F & 2 & E \\ G & 8 & E \\ \hline \end{tabular} b. Determine the critical path and project duration. The critical path is path and the project duration is days. (Enter your response as an integer.) a. Choose the correct network diagram for this project. c. D. c. Calculate the slack for each activity. (Enter your responses as integers.)