Calculate the range of the following dataset: {12.5,4.2,18.9,7.3,15.6}\{12.5, 4.2, 18.9, 7.3, 15.6\}{12.5,4.2,18.9,7.3,15.6}.
15.615.615.6
11.411.411.4
14.714.714.7
6.46.46.4