Consider the following network for conducting a two week (10 working days) computer training class:

N A B V 1 w 2 w 3Activity A: Obtain instructor B: Locate a room C: Check costs D: Room open? E: Schedule class Crashed N am! Cost Time Normal (total) (days) Cost $800 7 $500 350 3 200 900 6 500 500 3 200 550 2 300 $3100