A wood-burning stove operates for an extended period of time in a room measuring 9.00 m x 9.00 m. The ceiling is at a height of 5.80 m. The ventilation system achieves 0.10 ach (air changes per hour). Once steady state conditions are reached, the carbon monoxide(CO) level reaches 4.00 mg/m3 and remains constant. Assume that the ventilation air has negligible CO and that CO is conservative (nonreactive). At what rate does the stove emit CO? Give your answer in units of mg/hr.