What are the upper and lower quartiles of this data set?

118, 124, 124, 137, 138, 138, 138, 140, 143, 150, 151, 152, 156, 158, 159, 159, 159, 160, 162, 163, 165, 169, 170, 172, 173, 174, 177, 178, 206