A random sample of 42 students gave a mean age of their vehicle of 11.3 years and a standard deviation of 3.4 years. A separate random sample of 38 employees gave a mean vehicle age of 9.2 years with a standard deviation of 3.1 years. Find a 90% confidence interval for the difference in the population mean a vehicle ages between students and employees, u1-u2. Use students as the first population. Please show your work each step and if you use a calculator shortcut please state how you entered it as I'm really trying to learn how to use a calculator.. Thank you so much