Use the matrices below to perform matrix multiplication. 5 11] 3 4 B = 9 0 12 C = -3 7 6 9 If the operation is undefined, enter NA. Hint: To create a matrix in Mobius, click on the icon ? that has three rows of three dots - it's next to the infinity symbol. Specify the appropriate number of rows (horizontal) and columns (vertical). sin (a) ? ac BC =