The Queens Furniture Company produces beds and desks. Each bed requires 12 hours of carpentry and 8 hours of varnishing. Each desk requires 8 hours of carpentry and 16 hours of varnishing. There are 72 hours of carpentry time and 80 hours of varnishing time available. Beds earn $60 of profit per unit and desks earn $80 of profit per unit. What is the objective function?

a. P = 12x + 8y c. P = 60x + 80y

b. P = 8x + 16y d. P= 12x + 16y

4. Refer to the data in question 3. Which is the complete set of constraints?

a. 8x + 12y < 72 8x + 16y < 80 x, y > 0 c. 12x + 8y < 72 8x + 16y < 80 x, y > 0

b. 12x + 8y < 72 16x + 8y < 80 x, y > 0 d. 6x + 4y < 40 8x + 16y < 72 x, y < 0