Activity 7 Is Directly Preceded by Two Activities-Activity 5 and Activity

Multiple Choice

Activity 7 is directly preceded by two activities-activity 5 and activity 6.Activity 5 has an expected duration of five and an ES time of six.Activity 6 has an expected duration of seven and an ES time of seven.Activity 7 has an expected duration of 10.The ES for activity 7 is:

A) 11
B) 14
C) 21
D) 24
E) 25