4. As of August 8, 2012, the national average price for a ga||0n of regular unleaded gasoline was $3.63. A sample of nzl Illinois gas stations taken on August 8, 2012 had an average price of $3.85 per gallon. It is of interest to use this sample to compare the average gas price in Illinois to the national average. a) (4 points] State the null and alternative hypotheses for testing if this sample provides evidence that the average gas price in Illinois exceeds the national average