Answer:
B , D , C
Explanation:
the central angle x is equal to the measure of the arc that subtends it, so
x = 90°
similarly
z = 22°
similarly the central angle subtended by arc y° is y°
the 3 angles on the diameter sum to 180° , that is
x + y + z = 180°
90° + y + 22° = 180°
112° + y = 180° ( subtract 112° from both sides )
y = 68°