Your friends are desperate, now they must write a report on heat transfer considering the loss by convection. To do so, they start by considering a flat wall at an ambient temperature of 38C. The wall is covered with a 2.5-cm-thick layer of insulation whose thermal conductivity is 1.4 W/m.C, and the temperature of the wall inside the insulation is 31.5C. The wall loses heat to the environment by convection and they must make the report considering that the outside temperature of the insulation does not exceed 41C, they must also determine the value of the convection coefficient.