A combined cycle power plant uses mercury (Hg) for the high-temperature cycle (topping cycle shown in blue) and water (or steam) for the lower-temperature cycle (bottoming cycle shown in red), as in Fig. Q 2(a), where the temperatures and pressures are shown. The maximum temperature in the steam cycle (bottoming cycle) is where the steam leaves the superheater at state point 4 where it is 500°C. The mercury is dry saturated vapour at the inlet of mercury turbine. Sketch the schematic diagram again. Draw the cycle on T-s diagram by noting the corresponding state points designated by 1, 2,. and a, b,. on the schematic diagram. (Hint: Overlap both T-s diagrams on each other by considering the temperatures, not the pressures.) List all the assumptions before your analysis. Assume the mercury feed pump work input is very small. Determine: (a) the ratio of the mass flow rate of mercury to the mass flow rate of water in the heat exchanger that condenses mer- cury and boils the water, and (b) the thermal efficiency of this combined ideal cycle. The following Table Q 2 shows the saturation properties for mercury (Hg):