The average weight of 42 puppies at 10 weeks was 14.8 lbs with a standard deviation of 1.1 lbs

Find the 90% confidence interval for the average 10-week weight for golden retriever puppies.Show/explain your work, and identify the following: the estimated population mean and degrees of freedom; the assumptions you are making for this calculation; the critical value for the distribution; and the margin of error

Sorry for the strange lines, I cut and pasted from my IPhone.