2. Let $v_{1}=\left\begin{array}{c}-3 WOW 6\end{array} ight), v_{2}=\left[\begin{array}{c}-2 11 21 3\end{array} ight], v_{3}=\left[\begin{array}{c}0 -6 3\end{array} ight]$ and $\mathrm{p}=\left [\begin{array}{c}1 W 14 \\ -9\end{array} ight]$. a. Determine if $p$ is in the column space of $A$ where $A= [\mathrm{v} 1 \mathrm{v} 2 \mathrm{v} 3]$ b. $B$. Is $u=(-2,3,1)$ in the null space of $A$.CS.SD.123||