11 (a) Using the activity times given below, calculate the expected activity time t and the activity variance in Excel. Print this page, put the expected activity times on the respective nodes and perform a forward and backward pass through the network. Answer: What is the project completion time, what is the critical path? Calculate Slack for each activity. Go to the next tab in this spreadsheet and follow instructions there. Calculate Enter & Calculate Activity to tm to o Activity Late Early Slack A 8 8 8 A B 12 13 B 5 6 7 D 10 12 14 E 9 10 12 E F 14 18 26 F G 8 10 14 G H 5 7 10 H 1 13 13 13 1 J 10.5 13 15.5 J K 7 10 12 L 10 11 12 L M 6 6 6 M NOTE: do not round te, leave in 1 decimal place! Simply type the expected times in the center (1 decimal place), then perform the forward and backward pass. ES EF 1. LS LF B Critical Path is: Project Completition Time is: END START A A D M K