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]maxab,minab,maxcd,mincd;
assign maxab=(a>=b)?a:b;
assign minab=(a>=b)?b:a;
assign maxcd=(c>=d)?c:d;
assign mincd=(c>=d)?d:c;
assign max=(maxab>=maxcd)?maxab:maxcd;
assign min=(minab<=mincd)?minab:mincd;
endmodule