You have a 60 gallon hot water tank at home that is heated at 60C. Hot water is taken from the tank and mixed with

You have a 60 gallon hot water tank at home that is heated at 60ºC. Hot water is taken from the tank and mixed with the required amount of water at 10ºC to supply a hot shower using 8 L/s of water that is at 45ºC. How big of a heating element is required in the tank to keep its temperature constant at 60ºC. Assume that 5% of the heat is lost to the environment