A spherical concave mirror has a radius of curvature of $-400 \mathrm{~cm}$. An object $2.00 \mathrm{~cm}$ tall is on the central axis $400 \mathrm{~cm}$ in front of the mirror. (a) Determine the focal length. (b) Locate the image. ( $c$ ) Describe the image. (d) Determine the magnification. [Hint: Check out $\underline{\text { Fig. }} 36-5 .$.]