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