-Stats- Researchers claim that the mean time (in years) that passenger cars were kept by the original owner before being sold is less than pickup trucks. Records of 40 used passenger cars and 40 used plokup were randomly selected For ears, the mean was 5.3 years with a known population standard deviation 2.2 years. For pickup trucks the mean was 7.1 years with known population standard deviation of years. Is there enough evidence to support the claim? Assume the populations are normally distributed and use a significance level of %