The Electric Company produces generators and alternators for industrial purposes. Each generator requires 3 hours of wiring and 2 hours of testing. Each alternator requires 2 hours of wiring and 4 hours of testing. There are 18 hours of wiring time and 20 hours of testing time available. Generators earn $15 of profit per unit and alternators earn $20 of profit per unit.

Which is the complete set of constraints?

a.	2x + 3y < 18 2x + 4y < 20 x, y > 0	c.	3x + 2y <18 2x + 4y < 20 x, y > 0
b.	3x + 2y < 18 4x + 2y < 20 x, y > 0	d.	3x + 2y < 18 2x + 4y < 20 x, y < 0

What is the maximum profit that results from the optimal solution

a.	$90	c.	$188
b.	$100	d.	$120