EXERCISE 1 [15pt]| A car company says that the mean gas mileage for its luxury sedan is at least 21 miles per gallon (mpg). You believe the claim is incorrect and find that a random sample of 7 cars has a mean gas mileage of 18 mpg and a standard deviation of 4 mpg. At alpha equals a=0.025, test the company's claim. Assume the population is normally distributed. Use the P-VALUE METHOD [Make sure to fill in both left and right columns]