1. during the sampling the WBGT unit stopped working, so the sampling had to be done manually. the person doing the sampling couldn't remember what was required, so he measured everything. the ambient air temperature was 38⁰C, the wet bulb temperature was 24⁰C, the radiant heat was 38⁰C and the humidity was 10%. Determine the WBGT index in this case, using the appropriate equation for the scenario and justify why you selected that equation