Velocity and acceleration from a position vector

The position of a point is $\vec{r}(t)=1.5t^2\hat{ı}+\left(2.0t^3-6.0t\right)\hat{ȷ}$, with lengths in meters and time in seconds. Compute the velocity and the acceleration at the instant $t=2.0\mathrm{s}$ and their magnitudes.