Consider a firm that offers basic landscaping services. Costs are measured in dollars per service per day. The economist's table is incomplete. Quantity TC TVC TFC ATC AVC AFC MC (# of services) 0 $100 $0 $100 1 90 2 170 3 240 4 300 5 370 6 450 a. Use what you know about cost concepts to fill in the table. (Note: TC = total cost; TVC = total variable cost; TFC = total fixed cost; ATC = average total cost; AVC = average variable cost; AFC = average fixed cost; and MC marginal cost). b. Over what range of output does the company experience increasing returns to production? Diminishing returns? Explain.