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
);
    wire [3:0] max1,min1,max2,min2;
    assign max1 = (a > b)? a : b;
    assign min1 = (a < b)? a : b;
    
    assign max2 = (c > d)? c : d;
    assign min2 = (c < d)? c : d;

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

endmodule