a. b. C. The following information pertains to a production schedule for lettuce harvesting using 3 units of capital. (15 points) Workers Output Stage of Production 0 20 50 0 1 2 3 4 5 6 7 8 90 120 140 156 140 112 MPP APP Which input is the variable input? Which one is the fixed one? Fill the columns of MPP, APP and Stage of Production Graph the TPP, APP and MPP curves, labeling the axes. What happens on the TPP and MPP curves, specifically? Comment on the possibly profitable range of production process.