A certain coal-fired power plant has a rated power capacity of P = 960 MW. The output of this plant is W = 0.39QH, where QH is the energy input as heat from the hot reservoir. a. Write an equation for the efficiency of a heat engine in terms of QH and the heat QC exhausted to a low-temperature reservoir.  b. Which would increase the efficiency more, doubling QH or reducing QC by half?  c. Calculate the maximum thermal efficiency of the power plant.  d.  Calculate the absolute value of the exhausted heat (QC) each second in MJ for the power plant.

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