Calculate the interquartile range for each of the following sets of data:

a. \(3,6,7,12,15,17,23,28\)

b. \(8,4,1,6,13,10,12,5\)

c. \(3,8,14,11,16,7,14,15,11,9,12,6\)

d. \(15,22,17,13,31,25,22,19,26,30,27,19,23,21,27,29\)

e. \(450,560,340,510,390,670,540,420,720,480,560,510\)

f. \(29,27,26,15,28,26,32,27,26,25,30,26,27,18,23,35\)