If A, B, and Care 3 × 3, 3 × 2, and 2 x 6 matrices respectively, determine which of the following products are defined. For those defined, enter the dimension of the resulting matrix (e.g. "3x4", with no spaces between numbers and "x"). For those undefined, enter "undefined". CB: AB: A²: BA: Write the system -6y +4z 2 -4 -3x +9y = -2x +3y +11z = 10 in matrix form.
