An observer's eye is positioned at a fixed distance \(d\) along the principal axis in front of three different optical mirrors, each having the same physical aperture width \(W\). Mirror \(X\) is convex, Mirror \(Y\) is a flat plane mirror, and Mirror \(Z\) is concave with a radius of curvature greater than \(2d\). Which of the following correctly ranks the field of view \(\theta\) (the total angular region of space visible to the observer through the mirror) provided by each mirror?