An environmental scientist measures the concentrations of a pollutant (in parts per million, ppm) at seven different locations along a river. The recorded levels are:
6.5,1.2,4.8,9.3,2.1,7.6,3.4 6.5, \quad 1.2, \quad 4.8, \quad 9.3, \quad 2.1, \quad 7.6, \quad 3.4 6.5,1.2,4.8,9.3,2.1,7.6,3.4A bubble sort is used to arrange these measurements into ascending order.
State the number of swaps that will be made during the first pass of the algorithm.