Computer Homework 3Spring, 2020Name Folder name: e215- ASWCC Case: Case Problem 3 on page 380. (Do not use the data from page 382. Your data file is unique.)Your data file name: ec3.xsl Variable: X = Miles driven until transmission failure. Observations in sample: 50 auto PROBLEMS Note: Your reported answers must be rounded to integers.1. The sample mean of X = . (Use =average function)2. The sample standard deviation of X = . (Use =stdev function)3. The sample standard deviation (error) of the sample mean, , = .sn4. The 95% confidence interval for the population mean of X is : to .5. How many autos should be used in a random sample if we would like the population mean miles driven until transmission failure to be estimated with a margin of error of 3000 miles at the 99% confidence level