Find the change of basis matrix $$\underset{C \leftarrow B}{P}$$ to go from basis $$B$$ to basis $$C$$:

$B = \begin{bmatrix} 14 \\ 14 \end{bmatrix}, \qquad \begin{bmatrix} -17 \\ -17 \end{bmatrix}, \qquad$ $C = \begin{bmatrix} -2 \\ -2 \end{bmatrix}, \qquad \begin{bmatrix} 3 \\ 3 \end{bmatrix}, \qquad .$