Consider the trapezoidal numbers 1 1 1 1 2 2 2 1 1 2 3 3 3 2 1 The nth trapezoidal number is 1 2 n n n 2 1 where n is a positive integer Complete parts a through c below a Create a dot pattern representation of the trapezoidal numbers Select the correct answer below OA OB O C OD b Notice that 1 1 1 1x3 1 2 2 2 1 2x4 and 1 2 3 3 3 2 1 3x5 Show how the dots in a representation of a trapezoidal number can be rearranged into a rectangle with two more columns than rows A O B C OD