Below is a sample of the data in the file NFLAttendance which contains the $32$ teams in the National Football League, their conference affiliation, their division, and their average home attendance.

Conference Division Team Average Home Attendance

AFC West Oakland $54,584$

AFC West Los Angeles Chargers $57,024$

NFC North Chicago $60,368$

AFC North Cincinnati $60,511$

NFC South Tampa Bay $60,624$

NFC North Detroit $60,792$

AFC South Jacksonville $61,915$

$($a$)$

Create a treemap using these data that separates the teams into their conference affiliations $($NFC and AFC$)$ and uses size to represent each team's average home attendance. Note that you will need to sort the data in Excel by Conference to properly create a treemap.