4) An object is placed in front of a lens which forms an image of the object. A) If the lens is convex, the image cannot be virtual. B) If the image is real, then it is also inverted. C) If the image is real, then it is also upright. D) If the image is virtual, then it is also inverted. E) If the image is virtual, the lens must be a diverging lens. 5) If the diameter of a radar dish is doubled, what happens to its resolving power assuming that all other factors remain unchanged? A) The resolving power quadruples. B) The resolving power doubles. C) The resolving power is reduced to 1/2 of its original value. D) The resolving power is reduced to 1/4 of its original value. E) The resolving power does not change unless the focal length changes.