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If the central portion of a convex lens is wrapped in black paper as shown in figure

How wil the image formed by a convex lens be affected, if the central portion of the lens is wrapped in black paper, as shown in the figure.

If the top half of a convex lens is covered with black paper

Half of the lens is wrapped in black paper How will it change the image?

A convex lens is a diverging lens.

If the optic axis of convex and concave lenses are separated by a distance 5 mm as shown in the figure. Find the coordinate of the final image formed by the combination if parallel beam of light is incident on lens. Origin is at the optical centre of convex lens