We need to compare the score of all the players and determine which are the highest and lowest. There are negative and positive scores. For positive scores we can simply see which number is greater to determine the highest, but for negative scores this is inverted, the farther away from "0" a negative number is the lowest its value.
With this in mind we can organize the scores in a increasing order.
So the highest score is "2" and the lowest is "-3.5".