Find a ∩ b if a = {3, 6, 9, 12} and b = {2, 4, 6, 8, 10, 12}. {24, 48} {6, 12} {2, 3, 4, 6, 8, 9, 10, 12} next question ask for

Which of the following transformations will make coincide with ? a. counter-clockwise rotation 90º about a, followed by a translation 5 units to the right b. translation 5 units to the right, followed by a reflection across the y-axis c. translation 5 units to the right, followed by a reflection across the x-axis d. translation 1 unit up and 5 units to the right, followed by a reflection across the x-axis