The human body is adaptable to the extreme climatic conditions and keep the body core and skin temperature within the comfort zone by regulating the metabolic heat generation rate. For example, in extreme cold conditions, human body will maintain the body temperature by increasing metabolic heat generation rate while in very hot environment, human body will sweat and release heat generated within the body. To understand this effect of ambient conditions on human body repeat Example 3–14 in the text and consider a case, where climatic conditions change from -20°C and 20°C. For this change in ambient air temperature calculate the metabolic heat generation rate required within the different human body types with the skin/fat thickness of 0.0075, 0.005 and 0.0025 m so as to maintain the skin temperature at 34°C. Assume that inspite of the change in ambient air temperature the perspiration rate remains constant at 0.0005 s^-1 . Plot a graph of metabolic heat generation rate against the ambient temperature with a temperature increment of 5°C