Hi, i need help with these questions. Thank you.

Answer the questions completely. Show all of your work or support your answers by: Confidence Intervals For each problem: Show all of your work in finding the confidence interval or sample size, including the formula you used Or the calculator steps you used to reach the solution. . Interpret your confidence interval in a complete sentence. 1. A high-tech company wants to estimate the mean number of years of college education its employees have completed. A good estimate of the population standard deviation for the number of years of college is 1.0 years. How large a sample needs to be taken to estimate the mean to within 0.2 year, with 99% confidence? 2. Based on a random sample of 1,120 Americans 15 years of age or older, the mean amount of time spent eating or drinking each day is 1.23 hours. Assuming that the population standard deviation for amount of time eating or drinking is 0.65 hour, construct and interpret a 90% confidence interval for the mean amount of time spent eating or drinking each day by Americans age 15 years or older