please don't throw artificial intelligence solution!!

Experimental System and Procedure In the system (Figure 5.6.1), the copper pipe with an inside radius of 4mm, outside radius of 5mm, and a length of 80cm is insulated by using asbestos and glass wool in order. Thickness of inner insulation asbestos layer is 1cm. The asbestos insulation can be covered by glass wool with three different thicknesses of 2cm,4cm, or 6cm. A resistance wire in which heat is generated uniformly at a constant rate as a result of resistance heating is centrally located through the pipe. The input of heat is obtained from a voltage source that adjusted to a certain voltage. The temperatures of the air outside the insulated pipe and of the outside surface of the glass wool insulation are measured at the steady state condition. The thermal conductivities of the materials in the system are given in Table 5.6.1. Figure 5.6.1. Schematic representation of the conduction heat transfer sysiem. Table 5.6.1. Thermal conductivity of building and insulating materials. Ambient pressure is, 710mmHg At 25 Watt, ambient temperature is 18 degree of celcius and wall temperature is 18.4 degree of celcius At 35 Watt, ambient temperature is 18 degree of celcius and wall temperature is 24 degree of celcius a) What is the heat loss? b) What is temperature interfaces? c) What is critical radius