Mathematics

Problem

Given that

\mathbf{a} = \begin{pmatrix} -1 \\ 2 \\ 4 \end{pmatrix}

\mathbf{b} = \begin{pmatrix} p \\ q \\ -12 \end{pmatrix}

and that

\mathbf{a}

and

\mathbf{b}

are parallel, find the values of

p

and

q