Question 27 (5 points) Sarena keeps track of the amount she spends, in dollars, on weekly lunches during one semester: 18 24 27 25 28 36 23 31 24 30 37 29 30 18 28 27 17 27 a) Determine the range, mean, and standard deviation, correct to two decimal places. b) Remove the greatest and the least weekly amounts. Then determine the range, mean, and standard deviation for the remaining amounts. c) What effect does removing the greatest and the least amounts have on the three values