70 65 60 55 Price 50 fin hundreds) 45 40 35 30 25 20 15 10 -5 -4-3-2 . 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 -5 Quantity (in thousands) 10 (a) Approximately at what price is 6300 bikes supplied? $ I (Round to the nearest $50.) (b) Approximately at what price is 6300 bikes demanded? $ (Round to the nearest $50.)