A two-stage compressor has water-jacketed cylinders and a watercooled inter cooler. The compressor takes in 500 cfm of "free" airat 14.7 psia and 80 degree Fahrenheit and discharges it into areceiver in which the pressure remains constant. Cooling waterflows through jackets and the intercooler a the rate of 4 gpm, thewater entering at 80 degree Fahrenheit and leaving at 120 degreeFahrenheit. Assuming that the heat loss from the compressor to tissurroundings is negligible, calculate the horsepower supplied tothe compressor if the enthalpy of the air increases by 41BTU/lb.