A heater is a thin vertical panel 1.0m long and 0.7m high and is used in a warehouse to keep workers warm. The heater has air circulating on each side. Assume the maximum temperature of the panel is 60C (already above the board line that is safe for human hands to touch briefly without getting hurt). Assume the room air temperature is 18C but the warehouse wall temperature is 5C. Model the surface with an emittance of 0.9 and vair=1.57105m2/s. a. Determine the maximum power rating for the heater. b. Now if you run the heat by standing on its side (it will be 1.0m high and 0.7m long), determine the surface temperature. c. Compare case a and b and explain any differences you see