68. 4-bit Comparator

How do you plan to solve it?

/*Write your code here*/
module maxmin4
(
input wire [3:0] a,b,c,d,
output wire [3:0] max,min 
);
wire [3:0] min01,min23,max01,max23;
assign min01 = a < b ? a : b;  
assign min23 = c < d ? c : d;  
assign max01 = a > b ? a : b;  
assign max23 = c > d ? c : d;  
assign min = min01 < min23 ? min01 : min23; 
assign max = max01 > max23 ? max01 : max23; 
endmodule