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