The mean gasoline consumption of 10 cars is 28 liters with a standard deviation of 1.6 liters. Find the point and the interval estimates using 95% confidence level.

1. What are the confidence coefficients? A. +1.96 B. +2.26 C. +2.33 D. +2.58

2. The lower limit is approximately: A. 27 B. 26.85 C. 26.81 D. 26.68

3. The upper limit is: A 29 B. 29.15 C. 29.19 D. 29.32​