Use the given below to answer items 4 and 5: Given 4 distinct points, W, X, Y, Z on a line a. To prove that there exists a projectivity which carries W, X, Y, Z into X, W, Z, Y, consider the outline of the proof given below: Proof: Project the points W, X, Y, Z from point A not on a. Section a by b (distinct from a and AY) on Y and obtain the points W', X', Y', Z', so that that Y= Y'. Join W' and X meeting AZ = r at Z". 4. Draw the figure with the conditions in the given and in the outline of the proof stated above. 5. Supply the missing basis of each pencil and center of perspectivity that are established below. (W,X, Y, Z) (W' X, Y, Z) 7 (Z", A',Z, Z') 7 (X, W, Z, Y)