Help: Context Free Grammar
The answer should be the following:

$$
\begin{align}
&amp;S \to WQ  \mid XY \\
&amp;W \to aW  \mid ε \\
&amp;Q \to bQc \mid ε \\
&amp;X \to aXb \mid ε \\
&amp;Y \to cY  \mid ε
\end{align}
$$