A golf tournament has five rounds. The players are given scores for each round based on how many strokes they are above or below 72. Ricky has recorded his score for each of the 5 rounds. Strokes - how many times a player swings the club or hit the ball

Round 1 2 3 4 5
Number of Strokes Above or Below 72 -5 +6 -2 +4 +5

Write an expression to represent Ricky's total number of strokes for the five rounds.

What was his average number of strokes per round? Show your work.