9. XOR Gate Using Basic Gates

How do you plan to solve it?

// ============================================================
// Basic Gates (given)
// ============================================================
module and_gate(input a, b, output y);
    assign y = a & b;
endmodule

module or_gate(input a, b, output y);
    assign y = a | b;

endmodule

module not_gate(input a, output y);
    assign  y= ~a;

endmodule

// ============================================================
// XOR Gate
// ============================================================
module xor_gate (
    input  a, b,
    output y
);
    wire w0,w1,w2,w3;
    
    not_gate ng1(
        .a(a),
        .y(w0)
        );

    not_gate ng2(
        .a(b),
        .y(w1)
        );

    and_gate ag1(
        .a(a),
        .b(w1),
        .y(w3)
        );

    and_gate ag2(
        .a(w0),
        .b(b),
        .y(w4)
        );

or_gate og(
        .a(w3),
        .b(w4),
        .y(y)
        );    

endmodule