please show all work neatly and round to the two decimal place.

10. Average starting salary. The University of Texas at Austin McCombs School of Business performs and reports an annual survey of starting salaries for recent bachelor's in business administration graduates. For 2019, there were a total of 684 respondents. a. Respondents who were finance majors were 38.6% of the total responses. Rounding to the nearest integer, what is n for the finance major sample? (3p) 12 I b. For the sample of finance majors, the average salary is $72,125 with a standard deviation of $12,225. What is the 95% confidence interval for average starting salaries for finance majors? (3p)