Q1 Is QAP a diameter?
Q2 The problem is clear.I am giving you answers but you need to understand why statements are made.
a is an angle.A is an arc.
ax is 110 A WZY =220 A wxy=360-220=140
aZ=1/2 of 140=70
WZY is isosceles aYWZ=a WYZ=180-70/2=55
AWZ =1/2of 220=110
add all angles of the quad 110+80+70+100=360