27.12. Assume you are a software project manager and that you've been asked to compute earned value statistics for a small software project. The project has 56 planned work tasks that are estimated to require 582 person-days to complete. At the time that you've been asked to do the earned value analysis, 12 tasks have been completed. However the project schedule indi- cates that 15 tasks should have been completed. The following scheduling data (in person-days) are available Actual Effort 12.5 11.0 17.0 9.5 9.0 19.0 10.0 4.5 10.0 6.5 4.0 14.5 Task Planned Effort 12.0 15.0 13.0 8.0 9.5 18.0 10.0 4.0 12.0 6.0 5.0 14.0 16.0 6.0 8.0 3 8 10 12 13 15 Compute the SPI, schedule variance, percent scheduled for completion, percent complete, CP and cost variance for the project