G A particular brand of diet margarine was analyzed to determine the level of polyunsaturated fatty acid (in percent). A sample of six packages resulted in the following data: 18.7, 19.2, 19.4, 18.8, 18.4, 19.0. (a) Construct a 95% PI for the fatty acid content of a single package of margarine. Round your answers to 2 decimal places. (b) Find a tolerance interval for the fatty acid content that includes 95% of the margarine packages with 99% confidence. Round your answers to 2 decimal places.