Draw all the thermodynamics cycles in the pressure enthalpy chart and solve (only ph chart is permitted) 1. A steam power plant is proposed to operate between the pressures of 10 kPa and 2MPa with a maximum temperature of 400\deg C. What is the maximum efficiency possiblefrom the power cycle? 2. Increase the boiler pressure of Question no.1 to 4 MPa while maintaining the maximumtemperature and the minimum pressure. Calculate the percentage increase in thethermal efficiency. 3. Increase the maximum temperature in the cycle of Question no.1 to 600\deg C,while maintaining the boiler pressure and condenser pressure, and determine thepercentage increase in thermal efficiency. 4. Decrease the condenser pressure of the cycle in Question no.1 to 4 kPa whilemaintaining the boiler pressure and maximum temperature, and determine thepercentage increase in thermal efficiency.