Answer
Five number summary: 11, 18, 21, 26, 51
Work Step by Step
The smallest and largest values of the set of data are 11 and 51, respectively. The number in the middle of the set is 21. The number in the middle of the set from 11 to 21 is 18, and the number in the middle of the set from 21 to 51 is 26.