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] maxab, minab, maxcd, mincd;
always @(*)begin 
    maxab = (a>=b)?a:b;
    minab = (a<b)?a:b;
    maxcd = (c>=d)?c:d;
    mincd = (c<d)?c:d;
    max = (maxab>=maxcd)?maxab:maxcd;
    min = (minab<mincd)?minab:mincd;

end
endmodule