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, 
    output [3:0] 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