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] max1,max2,min1, min2;
assign max1=(a>b)?a:b;
assign max2=(c>d)?c:d;
assign min1=(a<b)?a:b;
assign min2=(c<d)?c:d;

assign max=(max1>max2)?max1:max2;
assign min=(min1<min2)?min1:min2;
endmodule