Answer of the below questions

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1. A project in its 26th week has an actual cost of $270,000. It was scheduled to have spent $261,000. For the work performed to date, the budgeted value is $272,000. What are the cost and schedule variances for the project? What are the SPI and CPI?

2. The following project is at the end of its 6th week. Find the cost and schedule variances. Also find the CPI and SPI. Then find the critical ratio of the project using earned value calculations. Finally, calculate the ETC and EAC for the project.
Activity Predecessor Duration (wks) Budget($) Actual Cost ($) %Complete
a – 2 300 400 100
b – 3 200 180 100
c a 2 250 300 100
d a 5 600 400 20
e b,c 4 400 200 20

3. A project has just completed its 87th item in the project plan. It was scheduled to have spent $168,000 at this point in the plan, but has actually spent only $156,000. The project manager estimates that the value of the work actually finished is nearly $162,000. What are the spending and schedule variances for the project? What are the SPI and CPI?