Context. Two teams, five scores each. A box plot compares the two distributions in one look — and its center line is the median.
Your task. Two parts: (1) write make_box(df) that draws a seaborn box plot with team on x and score on y, returning the axes; (2) set median_a to team A's median score, as a float.
Example. The line inside team A's box sits exactly at median_a.
Notes. For the median: filter the team A rows, take the score column, call .median(), wrap in float(...).