Under certain environmental conditions, the temperature of the human skin (10ºC) is lower than the core temperature of the body (18.3ºC). The transition between the two temperatures occurs across a subskin layer with an approximate thickness of 3 cm, which acts as an insulating coat. The thermal conductivity of the living tissue in this layer is approximately 0.54 W/mK. Estimate the heat flux that escapes through the skin surface. Treat the subskin tissue as a motionless conducting medium. The ambient air temperature under the same conditions is 11ºC. Calculate the heat transfer coefficient between skin and ambient air.