Question One O [Total: 25 Marks] A spherical solid of external diameter 0.4 m, made of hard rubber, and thickness 0.01 m is held in a stream of 27C water flowing past it at a velocity given on Bb. The inner surface of the spherical solid is heated to a uniform constant temperature. You measured the outer surface temperature of the rubber and found it to be 32C. 1.1. Starting with Fourier's Law, derive an expression for the thermal resistance through a spherical solid; then answer the question on Bb. [5] 1.2. Draw a diagram of the spherical solid in your script, indicating the positions of the known temperatures, the dimensions, and the direction and modes of heat transfer. Calculate the temperature at the inner surface of the hard rubber. [20]