The following data give the weights (in pounds) lost by 15 members of a health club at the end of 2 months after joining the club. 3 21 10 18 12 3 10 13 12 17 7 3 7 17 14 a. compute the values of the three quartiles and the interquartile range. q1= 25 q2= 33 q3= 55 iqr= 22 b. calculate the approximate value of the 82nd percentile. enter an exact value. c. find the percentile rank of 12. round your answer to the nearest integer. %