solve, show all steps and solutions. list assumptions and concluding comment

heat transfer

A commercial cubical refrigerator, 3 m on a side, has a composite wall consisting of an exterior sheet of 6.35-mm-thick plain carbon steel, an intermediate layer of 125-mm-thick cork insulation, and an inner sheet of 6.35-mm thick aluminum alloy (2024). Adhesive interfaces between the insulation and the metallic sheets are characterized by a thermal contact resistance of R". =2.5 x 10 m*-K/W. What is the steady-state cooling load that must be maintained by the refrigerator when the outer and inner surfaces of all six sides are 25C and -5C, respectively