The average human body has a surface tempreture of 30 degrees Celsius, a skin surface of 1.20m and an emissivity of 1.0. A. If the surrrounding tempreture is 20 degress Celsuis, the body's net rate of heat loss due to radiation is ________ Watts. B. How many food calories must be consumed per day to maintain that body tempreture if only radiative heat lossess are considered?________. Thanks for the help.