68. 4-bit Comparator

How do you plan to solve it?

/*Write your code here*/
module maxmin4(
    input [3:0] a,
    input [3:0] b,
    input [3:0] c,
    input [3:0] d,
    output reg [3:0] max,
    output reg [3:0] min
);
    task maxmin2(
        input [3:0] x,
        input [3:0] y,
        output [3:0] max_out,
        output [3:0] min_out
    );
        begin
            max_out = (x > y) ? x : y;
            min_out = (x < y) ? x : y;
        end
    endtask
    reg [3:0] max1, min1;
    reg [3:0] max2, min2;
    reg [3:0] dummy1, dummy2;
    always @* begin
        maxmin2(a, b, max1, min1);
        maxmin2(c, d, max2, min2);
        maxmin2(max1, max2, max, dummy1);
        maxmin2(min1, min2, dummy2, min);
    end
endmodule