While the image is still focused on the screen, a black sheet of paper is attached over the upper half of the concave mirror. How does the image on the screen change? a. Only the lower half of the object will show on the screen and dimmer. b. Only the upper half of the object will show on the screen with the same brightness. c. Only the upper half of the object will show on the screen and dimmer. d. The whole object will still show on the screen with the same brightness. e. The whole object will still show on the screen, but dimmer