A wall is exposed on one side to a heat flux of 1.5 kW/m2 which is conducted through the wall. For the following combinations, determine the temp drop through the wall (a) thickness 0.16m and k= 1.4, 15, 25, 45, 210 and 340 W/mK. (ii) Thickness 0.25m and k as above. Plot the temperature drop against the radio (L/k) and also (k/L).