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 reg [3:0]max,min);
 reg [3:0]max_ab,min_ab;
 reg [3:0]max_cd,min_cd;
 always@(*)begin
    max_ab = (a > b)? a : b ;
    max_cd = (c > d)? c : d ;
    min_ab = (a < b)? a : b ;
    min_cd = (c < d)? c : d ;
    max = (max_ab >= max_cd) ? max_ab : max_cd;
    min = (min_ab  <  min_cd) ? min_ab : min_cd;
 end
endmodule