Given the following information, calculate the CV, SV, CPI, and SPI for this project. Also provide recommendations to improve the project's performance if needed.

Activity A: This activity is 75% complete with an original budget of $200,000. Costs to date are $65,000, and the project is at the beginning of Week 3 of 4.

Activity B: This activity is complete. It was completed 3 weeks late, and it was supposed to be completed in 6 weeks. It was to have cost $500,000. Its true costs were $550,000.

Activity C: This activity starts next week. It is planned to cost $400,000 and take 6 weeks.

Activity D: This activity is 40% complete, at a cost of $80,000. It is at the end of Week 5 of 8 and was projected to cost $200,000.