17. Binary to Gray Code Converter

How do you plan to solve it?

module  bin2gray4 (
    input  [3:0]   bin_in,
    output [3:0]   gray_out
);
    // TODO: Assign outputs using part-selects and bit-selects
    assign gray_out [0] = bin_in [0] ^ bin_in [1];
    assign gray_out [1] = bin_in [1] ^ bin_in [2];
    assign gray_out [2] = bin_in [2] ^ bin_in [3];
    assign gray_out [3] = bin_in [3];
endmodule