7. Assume you are a software project manager and that you've been asked to computer earned value statistics for a small software project. At the time that you've been asked to do the earned value analysis, 16 tasks have been completed. However, the project schedule indicates that 18 tasks should have been completed. The following scheduling data (in person-days) are available: Compute the schedule variance, cost variance SPI, CPI, and CSI. 15 pts Task Planned Effort 13 10 15 7 9.5 18 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Actual Effort 12 11 18 9 9 20 11 5 10 8 4 12 5 7 14 15 9 8 4 14 18 12 5 18