The following sets of data show the high temperatures in four different cities for a week in December.

Which set of data has the greatest spread?
1) {3, 12, 25, 34, 51}
2) {5, 11, 18, 23, 35}
3) {22, 25, 29, 34, 63}
4) {36, 45, 48, 52, 55}