In the figure, lines a and b are parallel lines cut by a transversal line t. Name the indicated pair of angles. 1. 4 pairs of corresponding angles 2. 2 pairs of alternate interior angles 3. 2 pairs of alternate exterior angles 4. 2 pairs of supplementary angles in exterior same side of the transversal 5. 2 pairs of supplementary angles in interior same side of the transversal 6. 4 pairs of vertical angle