14. Use the 'Salareis' data set that shows the first 5 observations as follows. 1) Select female professors whose 'service' years is greater than 20 years 2) Sort the result of (1) in decreasing order by 'salary' 3) Calculate the average salary of the result of (1). Use 2 decimal places. 4) Calculate the average salary and standard deviation of professors' salaries by group of 'sex' and 'rank' 14. Use the 'Salareis' data set that shows the first 5 observations as follows. 1) Select female professors whose 'service' years is greater than 20 years 2) Sort the result of (1) in decreasing order by 'salary' 3) Calculate the average salary of the result of (1). Use 2 decimal places. 4) Calculate the average salary and standard deviation of professors' salaries by group of 'sex' and 'rank