A spherical Pyrex glass shell has inside and outside diameters of 0.1 m and 0.2 m, respectively. The inner surface is at 100C while the outer surface is at 45 C. (a) Determine the temperature at the midpoint of the shell thickness at radial location of 0.075 m). (b) For the same surface temperatures and dimensions as in part (a), will the midpoint temperature decrease/increase if the shell material were aluminum