Basketball points

name game 1 game 2 game 3 game 4
alfred 15 13 11 32
aj 29 21 9 32
tara 32 39 11 15
juanita 32 26 35 15

the top 10 basketball players averaged 38.5 points for the last 4 games. four friends wanted to compare their averages to the average of the state. based on the table above, what is the difference between sample average and the average of the top 10 basketball players?
a.
the difference is 15.5625 points.
b.
the difference is 15.875 points.
c.
the difference is 15.25 points.
d.
the difference is 14.9375 points.