Find the value of x, y, and z.
x: ____________
y: ____________
z: ____________
y is 104 degrees, as the required angle is the angle subtended by the cord
at the centre of the circle, which subtends an angle of 52 degrees from a
point on the circumference.
Also it looks to me as though there is insufficient information to determine
the other angles without further information.
RonL