(1 point) Let $A = \begin{bmatrix} -3 & 6 & 12 \\ 3 & -5 & -11 \\ -2 & 3 & 5 \end{bmatrix}$ and $b = \begin{bmatrix} -63 \\ 57 \\ -30 \end{bmatrix}$ Is $b$ is a linear combination of $a_1$, $a_2$, and $a_3$, the columns of the matrix $A$? \newline No \newline Yes. \newline If $b$ is a linear combination of the columns of $A$, determine a non-trivial linear relation between $a_1$, $a_2$, $a_3$ and $b$. Otherwise, enter 0's for the coefficients. \newline $a_1 +$ $a_2 +$ $a_3 = b.$
