4. list the ordered pairs in the relations on {1, 2, 3, 4} corresponding to these matrices (where the rows and columns correspond to the integers listed in increasing order). a) ⎡ ⎢ ⎢ ⎣ 1101 1010 0111 1011 ⎤ ⎥ ⎥ ⎦ b) ⎡ ⎢ ⎢ ⎣ 1110 0100 0011 1001 ⎤ ⎥ ⎥ ⎦ c) ⎡ ⎢ ⎢ ⎣ 0101 1010 0101 1 0 1 0 ⎤ ⎥ ⎥ ⎦ 5. how can the matrix representing a relation r