Data for a project is shown below: Activity A B C Duration Precedence (months) 3.00 1.00 A 2.00 A 3.00 A 2.00 1.00 C 1.00 Budget or Plnd. Cost 15000 5000 10000 21000 32000 5000 5500 Percent Completed 100 0 100 50 D E F G 0 0 0 The project started on June 1st. The project has a planned duration of 7 months. Data below are planned cost and actual cost (spent) from June to November: Month June July Aug Sept Oct Nov Planned Cost 5000 5000 5000 5000 12000 23000 Actual Cost 8000 8000 5000 5000 12000 12000 a) Compute cost and schedule variances. (4 points) b) Compute critical ratio. (4 points) c) Based on current cost performance level, what is the estimated cost in completing the project? (2 points) d) Based on current schedule performance level, how much more time (in months) is needed to complete the project? (2 points)