Angles — practice question

The diagram depicts right-angled triangle $ABC$ alongside quadrilateral $AEDC$. It shows a right angle at $A$; angle $B$ is $34^\circ$; at $C$ there is an angle marked $y^\circ$ with an adjacent angle of $17^\circ$; at $E$ the angles are $122^\circ$ and $x^\circ$; and at $D$ there is an angle marked $z^\circ$. NOT TO SCALE.