A car traveling at highway speed (assume 60 miles per hour, 1 mile = 5,280 ft) must overcome a drag force of approximately 62 lbf. If a gasoline-powered car has a highway fuel economy rating of 30 miles per gallon, and gasoline has a chemical energy content of 114,000 Btu/gallon, determine the rate of entropy generation (i.e. irreversibility) assuming the ambient temperature is 70 °F. You may neglect the combustion products (exhaust) in your analysis. Your result should be in units of Btu/hr-°R.