Afreezer compartment consists of a cubical cavity that is 2 m on a side. assume the bottom to be perfectly ulated (no heat flow). what is the minimum thickness of styrofoam insulation (k = 0.030 w/m/k) that must be applied to the top and side walls to ensure a heat load of less than 500 w, when the inner and outer surfaces are at -10 and 35c? (so the walls are made of styrofoam only)