(b) A student stands in a very cold environment at -15 C, wearing clothes that cover the skin almost entirely. The exposed surface area of the clothes is 1.6 m and has an average surface temperature of 27 C. The convection heat transfer coefficient is 15 W/mK and the emissivity of the surface of the cloth is assumed to be 0.7. Stephen-Boltzmann constant= 5.67 x 10-8 kg s K4. Answer the following questions: i. Calculate the total heat loss from the person's body to the environment. [4] ii. The person feels cold and therefore puts more cloths on. Which mechanism of heat transfer, between the person's body and the environment, is affected by the extra clothes and how does that help the person feel warmer? [4] iii. Without showing any calculation, predict the effect of extra clothes on the average temperature of the exposed surface of the clothes, and briefly explain your reasons. [4]