68. 4-bit Comparator

How do you plan to solve it?

/*Write your code here*/
module maxmin4(
    input  [3:0] a,
    input [3:0]b,
    input [3:0]c,
    input [3:0]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