(a) calculate the heat flux (in w/m2) through a sheet of a metal 12 mm thick if the temperatures at the two faces are 310 and 130 ˚c. assume steady-state heat flow and that the thermal conductivity of this metal is 51.1 w/m·k.(b) what is the heat loss per hour if the area of the sheet is 0.28 m2? (c) what will be the heat loss per hour if a material with a thermal conductivity of 1.1 w/m·k is used? (d) calculate the heat loss per hour if the first metal is used and the thickness is increased to 21 mm.(a) /m2( j/h(c) /h( j/h