Company A has 70 skilled engineers. The chief technical officer has to pick from the following projects to maximize the net present value of the selected projects, while meeting the manpower constraint.

Project	Engineers Required	NPV ($ millions)
A	10	30
B	15	35
C	8	25
D	18	40
E	17	37
F	13	55

Use Solver to answer the following questions:

What projects will be chosen if manpower constraint should be met? Enter Y or N for each project.

A: , B: , C: , D: , E: , F:

How many engineers are needed?

What is the total NPV? $ millions (enter an integer value)