Q1. Table Q1-1 provides the necessary information for constructing a project network and crashing the project duration for a small residential development. Table Q1-1 Project Information for a small residential development Activity Time Activity Cost ($) Manpower required (weeks) (number of laborers) Activity (1) Normal Crash Normal Crash Normal Crash (1,2) 16 8 2000 4400 20 40 B (1,3) 14 9 1000 1800 10 14 (2,4) 8 6 500 700 5 10 D (2,5) 5 600 700 5 6 (3,5) 4 2 1500 3000 5 10 (3,6) 6 4 800 1600 10 15 G (4,6) 10 7 3000 4500 5 7 H (5,6) 15 10 5000 8000 5 20 NA OO 00 (a) Construct the project network using an activity-on-arrow diagram. (b) Compute the Latest Start, Latest Finish, Earliest Start, Earliest Finish and Float for each activity, and the total duration without crash and identify the critical path for the project. (c) Draw the manpower profile for the project before crash and determine the maximum number of laborers required for the project. (d) Compute the total allowable crash time per activity and the crash cost per week for each activity. (e) Determine the minimum additional cost to crash the project to 33 weeks given that the indirect cost is $50/week