Economics homework help

A hot water heater operating at 240 V supplies to a quantity of water to warm it to the desired temperature of . What is the cost of the energy if the rate is $0.131/kWh? a. The mass of the water is needed to answer this question. b. The initial temperature of the water is needed to answer this question. c. The mass of the water, the initial temperature of the water, and the time it took to heat the water is needed to answer this question. d. $0.330.