Hi... there is a question i can't figure out. "A 400-g stainless steel tea kettle containing 500g of water is on top of the stove.The portion of the tea kettle that is in contact with the heating element has an area of 0.005m^2 and is 2.5mm thick. At a certain moment,the temperature of the water is 75C,and it is rising at the rate of 4C per minute. What is the difference in temperature between the inside and the outside of the bottom of the tea kettle? the thermal conductivity of stainless steel is 16.3W/(m K) and the specific heat is 448 J/(kg K)." Thank you for any replies!!!