$/Q 5. In the above exhibit, the vertical distance between lines B and C at any level of output represents $8 B a. marginal cost b. average total cost C. d average variable cost average fixed cost 6. In the above exhibit, when output is 10, a. average fixed cost is $7 b. average total cost is $1 G. 10 0/t d. average variable cost is $7 average fixed cost is $1 7. If marginal cost exceeds average variable cost, a. average variable cost is negative b. average variable cost is increasing c. marginal cost is greater than average total cost