(19.30) The Environmental Protection Agency (EPA) fuel economy ratings say that the 2014 Toyota Pirus hybird car get 46 miles per gallon (mpg) on the highway. Deborah wonders whether the actual long-term average highway mileage u of her new Pirus is less than 46 mpg. She keeps careful records of gas mileage for 3000 miles of highway driving.Her result is x (bar)=45.2 mpg. What are her null and alternative hypotheses?