Problems The OM Explorer and POM for Windows software is avail able to all students using the 12th edition of this textbook. Go to htlp:llwww.pearsonhighered.com/krajewski to download these computer packages. Ifyou purchased MyLab Operations Management, you also have access to Active Models software and signicant help in doing the following problems. Check Developing the Project Schedule 1. Consider the following data for a project to install a new server at the Northland Pines High School. Activity Activity Time (days) Immediate Predecesscs} A 2 B 4 A C 5 A D 2 B E 1 B F B B, C G 3 D, E H 5 F I 4 F J T G, H, | 3. Draw the network diagram. b. Calculate the critical path for this project. c. How much slack is in each of the activities G, H, and I? 2. The following information is known about a project to upgrade a pointofsale system at Kids and Tots Apparel. Activity A 7 s 2 A Activity Time (days) Immediate Predecessns) with your instructor on how best to use these resources. In many cases, the instructor wants you to understand how to do the calculations by hand. At the least, the software provides a check on your calculations. When calculations are particularly complex and the goal is interpreting the results in making deci sions, the software replaces entirely the manual calculations. Activity Activity Time (days) Immediate Predecesas) C 4 A D 4 B, C E 4 D F 3 E G 5 E I. Draw the network diagram for this project. b. Determine the critical path and project duration. c. Calculate the slack for each activity. 3. A project for improving a billing process has the follow ing precedence relationships and activity times. Activity Activity Time (wks) Immediate Predecessor(s) A 3 B 11 C 7 A D 13 B, C E 10 B F 6 D G 5 E H 8 F, G