A catch of five fish of a certain species yielded the following ounces of protein per pound of fish: 3.1, 3.5, 3.2, 2.8, and 3.4. We can calculate the sample mean and standard deviation to be 3.20 and 0.27 respectively. Assume that the protein contents are normally distributed. What is a 90% confidence interval estimate for ounces of protein per pound of this species of fish