The diagram shows an image produced by a lens.
From left a label W, a shining light bulb, with arrows running up and right and down and right, a point X, a lens flat on the left and concave on the right with the 2 arrows entering the lens, the top arrow continuing more sharply upward and the lower arrow continuing straight, a point Y, an eye looking left, and a point Z.
At which point does the image appear?
W
X
Y
Z