position function

If the vertical position of a ball as a function of time is
$y\left(t\right)=bâ‹\dots t+câ‹\dots t^3$where b = 2 m/s and c = -2 m/s³, what is the acceleration of this ball at the time t = 2 s?

Group of answer choices

-18 m/s²

-36 m/s²

-24 m/s²

-12 m/s²