A project has $4$ tasks, namely, A$,$ B$,$ C$,$ and D$.$

The baseline estimate for project completion time is $20$ days.

A$,$ B$,$ and C have no predecessors.

C is a predecessor to D$.$

As per the status date:

A and B should have been completed $100\%.$

C should have been completed $75\%.$

Baseline cost for these tasks are: A$=20,$ B$=15,$ C$=30,$ and D$=20.$

Actual progress went as:

A$=100\%$ finished at actual cost of $25$;

B $=80\%$ at Actual cost of $10$;

C$=50\%$ at actual cost of $20.$

Calculate PV$,$ EV$,$ AC$,$ CV$,$ SV$,$ CPI, SPI, baseline project duration, budget at completion,

estimate at completion, and the new time estimate to complete the project. How has project

done so far?