The heating element of an electric cook top has two resistive elements, R1 = 57.6Ω and R2 = 115.2Ω, that can be operated separately, in series, or in parallel from voltages of either 120V or 240V. For the lowest power, R1 is in series with R2, and the combination is operated from 120V. What is the lowest power? For the highest power, how should the elements be operated? What power results? List three more modes of operation and the resulting power for each.