Harrington Corporation produces three products, A, B, and C. Pertinent information on these products is as follows: Product Selling Price per Unit Variable Cost per Unit Fixed Cost per Unit DL Hours per Unit A $ 4.00 $ 1.00 $ 2.00 2 B $ 3.50 $ 0.50 $ 2.00 2 C $ 6.00 $ 2.00 $ 3.00 3 The objective function for a linear program to maximize contribution margin from the set of three products is:.1. Z = $4A + $3.50B + $6C. 2. Z = A + B + C. 3. Z = A + $0.50B + $2C. 4. Z = $3A + $3B + $4C. 5. Z = $3A + $2.50B + $5C.