You were shipwrecked on a desert island with a friend. You both have a set of two lenses. Yours are +2.00D and -8.00D 
whereas your friend's are +2.00D and +5.00D. To look for help you each decided to make a telescope with your lenses.

a. What types of telescope can you and your friend make?

b. What are the lengths of the telescopes made by you and that of your friend?

c. Whose telescope will provide more magnification?

d. What types of images are formed by each telescope?