Based on the following table, calculate the ES, EF, LS, LF times and the slack for activity E.

Activity Time Immediate Predecessor

A 3 -

B 3-

C 4A

D 5 A

E 6 B

F 7 C,D,E

	A.	ES = 0, EF = 3, LS = 1, LF = 4, slack = 1
	B.	ES = 3, EF = 9, LS = 3, LF = 9, slack = 0
	C.	ES = 0, EF = 3, LS = 0, LF = 3, salck = 0
	D.	ES = 3, EF = 7, LS = 5, LF = 9, slack 2