Consider the table below, called Roster. If I wanted to determine what the average PtsPerGame value was by position $($e$.$g$.,$ how many points per game are scored on average by those listed as chasers$),$ which of the following would need to be part of my query?

PlayerID Name Position PtsPerGame

$1$ Moe Chaser $14\mathrm{.}5$

$2$ Stampy Keeper $5\mathrm{.}5$

$3$ Agnes Chaser $18\mathrm{.}2$

$4$ Blinky Beater $9\mathrm{.}0$

$5$ Rainier Beater $4\mathrm{.}8$

$6$ Selma Seeker $15\mathrm{.}3$

$7$ Jimbo Chaser $16\mathrm{.}7$

Group of answer choices

A SORT BY clause

A GROUP BY clause

A SUM function

An analytical function