how to do part c in excel

2. The Stefan-Boltzmann law can be employed to estimate the rate of radiative heat flow H from a surface as H=AT4 where A is the surface area, is the emissivity of the surface (dimensionless value that characterizes the emitting properties of the surface), is a universal constant called the StefanBoltzmann constant (5.67108W/m2K4), and T is the absolute temperature. For a flat steel plate with A=0.15m2,=0.90, and T=75020K, determine (a) the exact range of possible radiative heat flow values (b) the estimated range of possible heat flow values using a first-order error analysis (from the Taylor series) (c) the 85% credible interval (CrI) for the radiative heat flow values based on stochastic simulation