** Need question 4 answered. **

2. Last year it took Crestview Inc. $47.8 million labor cost, $62 million raw material cost, and $83.6 million capital to make $250 million sales. The company's partial productivity for raw material is? 3. In question 2, the company's productivity for labor and capital is? 4. For question 3 (the previous question), in addition to non-negative constraints, other constraints are _____ ,_____, and _______. No need to use multiplication sign. For example, just write 10A not 10*A. For greater(less) than sign, just write it as >= (<=). Also please leave no space in equation. For example, A<=100, not A <= 100.