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;
wire [3:0] min_ab;
wire [3:0] max_cd;
wire [3:0] min_cd;


assign max_ab=(a>b)?a:b;
assign min_ab=(a<b)?a:b;

assign max_cd=(c>d)?c:d;
assign 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