How do I answer a and b

2. Refer to the table provided. The price is equal to $14 Quantity Variable Total Marginal of Cost Cost Cost Potatoes (VC) (TC) (MC) (Bushels) 0 $0 $14 1 $16 $30 $1 16 2 $22 $36 1 6 3 $30 $44 9 8 4 $42 $56 1 12 5 $58 $72 6 $78 $92 # 20 7 $102 $116 # 24 a. What is the firm's marginal cost at each quantity (fill in the chart) (2 pts) b. What is the firm's fixed cost? (1 point) c. What is the average variable cost of producing 3 units? (1 point)