Shaving>makeup mirrors typically have one flat and one concave (magnifying) surface. You find that you can project

Question:

Shaving>makeup mirrors typically have one flat and one concave (magnifying) surface. You find that you can project a magnified image of a lightbulb onto the wall of your bathroom if you hold the mirror 1.8 m from the bulb and 3.5 m from the wall.
(a) What is the magnification of the image?
(b) Is the image erect or inverted?
(c) What is the focal length of the mirror?