A very thin-walled spherical storage tank has an outer diameter of 26 cm. The inner surface temperature of the tank is 413K. The spherical tank was covered with three insulation layers, and each insulation layer is 50 mm thick. These layers' thermal conductivities are 0.02, 0.06, and 0.16 W/m. K (i. e., starting from inside). The layer's outside surface temperature is 303 K. Calculate the heat transfer rate and the interface temperatures of insulating layers