1- Consider the following project (times given in days): Acivity m a b Predecessors a 1 4 7 b 2 2 2 PP C 2 10 5 8 a d 3 4 5 a e 4 6 00 8 c, b f g بها 0 0 6 c, b 3 19 6 9 d, e Find: a. The network using AON. b. All expected activity times, variances, and slacks c. The critical path and expected completion date. d. The probability the project will be done in 23 days. e. The completion time corresponding to 95% probability. 2- A sales project at month 5 had an actual cost of $34,000, a planned cost of $42,000, and a value completed of $39,000. Find the cost and schedule variances as well as the CPI and the SPI. 3- Given the following information, calculate the critical ratios and indicate which activities are on target and which need to be investigated. Comment on the situation for each of the activities. Activity Actual Progress Scheduled Budgeted Actual Progress Cost Cost ABCD 2 days 2 days $40 $35 В 4 days 6 days $30 $40 1 day 3 days $50 $70 3days 2 days $25 $25 4- Build a 3-level WBS for the construction of a new home. List all clarifying assumptions, but assume that a minimum that there will be lot purchasing, land clearing, construction (including framing, electrical, plumping, roofing, drywall and finishing activities). Show all levels, and include sufficient level descriptions to illustrate your understanding of WBS concepts.