Use the matrices below to perform the indicated operation if possible. 9 U 9 B = 7 . C = 4 3 7 1 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). 5 5in[a} f 555 m C! Q m o 2C+B: B