Haloalkanes And Haloarenes

What is the product ' $Z$ ' in the following reaction sequence?

\(\mathrm{C}_6 \mathrm{H}_5 \mathrm{~N}_2 \mathrm{Cl} \xrightarrow[\mathrm{HCl}]{\mathrm{Cu}_2 \mathrm{Cl}_2} X \xrightarrow[\text { Na/dry ether }]{\mathrm{CH}_3 \mathrm{Cl}} Y \xrightarrow[\text { Dark }]{\mathrm{Cl}_2 / \mathrm{Fe}} Z\)