a 4.2 cm tall object is placed 29 cm in front of a spherical mirror. it is desired to produce a virtual image that is upright and 3.5 cm tall. a) What type of mirror should be used? It's a convex mirror.(b) Where is the image located? (Your answer should be positive if the image is in front of the mirror, and negative if the image is behind it.) Answer in cm (from the mirror)(c) What is the focal length of the mirror? Answer in cm(d) What is the radius of curvature of the mirror? Answer in cm