#3 - A survey of U.S. companies that do business with firms in India asks: approximately how many years has your company been trading with firms in India? Suppose the population is normal. In practice, population standard deviation is often unknown. Suppose the random sample of 44 responses yielded a mean of 11.643 years with a sample standard deviation of 7.8 years. Please construct a 90% confidence internal again.What is the lower confidence interval limit? Enter your answer to 3 decimal places.

If you can show how to set this up in R, please do so. Thank you!