(1 point) Starting salaries of 110 college graduates who have taken a statistics course have a mean of $44,382. Suppose the distribution of this population is normal and has a standard deviation of $9,1 07. Using an 81% confidence level, find both of the following: (NOTE: Do not use commas nor dollar signs in your answers.) (a) The margin of error: ::: (b) The confidence interval for the mean #5 555