Acomposite spherical shell of inner radius r1 = 0.25 m is constructed he inner most shell is constructed from lead with an outer radius r2 = 0.3m and the outer shell is constructed from aisi 302 stainless steel with an outer radius r3 = 0.31 m. the cavity is filled with radioactive wastes that generated heat at a rate of q dot = 5 x 10 w/m^3. it is proposed to submerge the container in oceanic waters that are at a temperature of t = 10�c and that provide a uniform convection coefficient of h = 500 w/m^2-k at the outer surface of the container. calculate the temperatures at the outer surface, at the interface where the lead and the stainless steel touch, and at the interface of the lead and the radioactive waste.