Suppose that A, B, and C are 5 x 5, 5 x 4, and 4x 6 matrices, respectively.Determine which of the following products are defined.(a) BA. Answer: ________(b) BC Answer: ________(c) CB Answer: ________(d) AB Answer: ________Note:i) For those defined, enter the size of the resulting matrix (e.g. 3 x 4 with spaces between the numbers and x).ii)For those undefined, enter undefined.