68. 4-bit Comparator

How do you plan to solve it?

/*Write your code here*/
module maxmin4(
    input [3:0] a, b, c, d,
    output [3:0] max, min
);
    wire [3:0] max_ab = (a >= b) ? a : b;
    wire [3:0] min_ab = (a < b) ? a : b;
    wire [3:0] max_cd = (c >= d) ? c : d;
    wire [3:0] min_cd = (c < d) ? c : d;
    assign max = (max_ab >= max_cd) ? max_ab : max_cd;
    assign min = (min_ab < min_cd) ? min_ab : min_cd;

endmodule