A candle 20 cm high is placed 60 cm in front of the center of a thin lens. The lens has a focal length of -80 cm.
a) Find the location 
of the image, its magnification, and
indicate whether the image is real or virtual.
b) Draw a ray diagram to locate the image in agreement with your
answers to a. Be sure to include 3 rays that uniquely specify the
image location.