Assume you have completed half of a 6 month project. The BAC was $ 200,000. PV = $ 120,000 EV = $ 100,000 AC = $ 90,000 !! %3! a. What is the cost variance, schedule variance, cost performance index ( CPI), and schedule performance index ( SPI) for the project? Show formula and calculation for each. b. How is the project doing? Is it ahead of schedule or behind schedule? Is it under budget or over budget? c. Use the CPI to calculate the estimate at completion ( EAC) for this project. Is the project performing better or worse than planned? d. Use the schedule performance index ( SPI) to estimate how long it will take to finish this project.