A 83 kg hiker uses 211 kcal hr-1 of energy whilst hiking. Assuming that 20% of this energy goes into useful work and the other 80% is converted to heat within the body, calculate the temperature change, in units of kelvin (K), of the hiker's body during a 1.7 hour long hike. Assume that none of this generated heat is transferred to the environment during the hike. The average specific heat capacity of a human body is 0.83 kcal kg-1 K-1.