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10. [6 Points] Use the listing method to write the Cartesian products below. Make sure to use proper notation. (a) {(1, b, c} X 0 ('0) {say} x {m C} (c) {1,2} x {3,4} x {5,6,7} 11. [4 Points] Floors and ceilings. (a) Compute [1.757 [8.051]. (b) Suppose that n is an integer, and a: is a real number, and 3: 75 71. If [as] = 11, What are [33] and [33] (express them in terms of n)