Find the smallest possible set (i. e., the set with the least number of elements) that contains the given sets as subsets. (Enter your answer using roster notation. Enter EMPTY or ∅ for the empty set.) {1, 2}, {1, 3, 4}, {4, 5, 8, 9}

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