Part b i cannot figure out

3 The highway fuel economy of a 2016 Lexus RX 350 FWD 6-cylinder 3.5-L automatic 5- speed using premium fuel is a normally distributed random variable with a mean of H = 19.75 mpg and a standard deviation of o = 1.75 mpg. 5 points (a) What is the standard error of X , the mean from a random sample of 25 fill-ups by one driver? (Round your answer to 4 decimal places.) eBook Standard error of X 0.3500 Hint Ask (b) Within what interval would you expect the sample mean to fall, with 98 percent Print probability? (Round your answers to 4 decimal places.) References The interval is from to