Unit 6: Apples to Apples: Production 3: Perfect Competition 6.1 The Production Function Worksheet 1. Davids brick companv produces bricks using a 1Dton machine and cement. The quantitv of output, measured in pounds of brick is given in the table below. Q of Cement Quantity of bricks [pounds] [1 [J '1 1,000 2 1800 3 2,400 4 2,300 a. What is the xed input? I b. What is the variable input? l c. Construct another row showing the marginal product of the variable input d When does it start to show diminishing returns