A little fish of 1 cm of height is at the center of a spheric fishbowl with diameter of 20 cm filled with water (n=1.33). The material of the sphere is so thin that its effects of refraction can be neglected. A thick equiconvex lens with thickness 2 cm and radii of curvature of 15cm and refraction index of 1.5 is located with its first vertex at a distance of 50cm of the center of the bowl. What is the position on the optic axis of the image of the fish? What is the size of the image ?