Please help with this math problem ASAP! Will give brainliest!

Answer:
I only know what y is, y is 4a, wait I think a is z and z is a. I’m not sure
Step-by-step explanation:
Step-by-step explanation:
value of a :
4a + a = 180°
5a = 180°
a = 36°
value of y :
y = 4a
y = 4(36)
y = 144°
value of z :
z = a
z = 36°