68. 4-bit Comparator

How do you plan to solve it?

module maxmin4(
    input [3:0] a,
    input [3:0] b,
    input [3:0] c,
    input [3:0] d,
    output [3:0] max,
    output [3:0] min
);

assign max = (a > b ? a : b) > (c > d ? c : d) ? (a > b ? a : b) : (c > d ? c : d);
assign min = (a < b ? a : b) < (c < d ? c : d) ? (a < b ? a : b) : (c < d ? c : d);

endmodule