Question on triple integral polar

[yopy]

Find the mass of a solid bounded by
x = (4-y²)^1/2
y = 0
z = 0
z = 1 + x
with density = y

i understand how to set it upand transform to polar and how to do it but my teacher said its supposed to be -pi/2 to pi/2 for the integral with respect to theta. shouldn't it be 0 to pi/2 because its bounded by y = 0?

 

[Billy Bob]

Maybe "y=0" should be "x=0"? The given equations don't seem to make sense without x=0 being included.