A local project being analyzed by PERT has following activities.

Activity	Activity name	Times Estimates			Predecessor
		Optimistic time	Most likely	Pessimistic
Design	A	10	20	26	NIL
Build prototype	B	4	4	10	A
Evaluate equipment	C	4	6	14	A
Test prototype	D	2	3	4	B
Produce report	E	1	5	6	C, D
Procedures arrangement	F	7	8	9	C, D
Presentation	G	2	6	7	F, E

What is its expected activity time and variance for activity E?

Select one:

A. ET=5.5; V=1.00

B. ET=19.3; V=0.83

C. ET=3.0; V=0.11

D. ET=7.0; V=7.12

E. ET=4.5; V=0.69