What software or facility is best for a small firm spread out across the Northeast U.S. looking to inexpensively conduct regular videoconferencing?

An oil drilling company ordered a pumpjack for its operations. The pumpjack manufacturing company not only set up the machine but also provided training to the people who needed to use it

It also let the drilling company know that it would be undertaking the maintenance and repair services for the pumpjack. What kind of a service is the manufacturing company providing?

Consider the following project schedule:

Activity Immediate Predecessor Time ES EF LS LF A -- 4 0 4 6 10 B -- 5 0 5 0 5 C A 3 4 7 10 13 D B 8 5 13 5 13 E B 2 5 7 16 18 F C, D 3 13 16 15 18 G C, D 7 13 20 13 20 H E, F 2 16 18 18 20 (a) Which activities are critical? (b) Which activity has the most slack?