Asports club rewards teams based on overall points earned in a season. the data for points are shown in the table, where low represents the fewest points scored and high represents the highest points scored by a single team member.

team low high range mean median iqr σ
team l 4 17 13 9.4 9 9.75 4.8
team m 6 14 8 9.7 9.5 6.25 3.2
team n 1 20 19 13 14.5 4.75 5.6

part a: if the club wants to award the team that has the most consistent scoring among its team members, which team should it choose and why? justify your answer mathematically. (5 points)

part b: if the club wants to award the team with the highest average score, which team should it choose and why? justify your answer mathematically. (5 points)