From the lens equation calculate the position of the following images produced by a convex lens. Draw a ray diagram in each case and state whether the image are real or virtual and also if they are
upright or inverted
a. U= 5 cm and f= 2 cm
b. u = 10mm; f = 15mm
c. u = 3 cm ; f = 4 cm

Calculate the position of the images formed by the following concave lenses.
a. For an object with u = 6 cm if the focal length is - 2 cm
b. For an object with u = 4 cm if the focal length is -8 cm
c. For an object with u = 240mm if the focal length is - 8 cm