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);
    // write code here for or gate
    or (y, a, b);

endmodule

module not_gate(input a, output y);
    // write code here for not gate
    not (y, a);
endmodule

// ============================================================
// XOR Gate
// ============================================================
module xor_gate (
    input  a, b,
    output y
);
    wire bnot, and1, anot, and2, end1;
    not_gate bt(b, bnot);
    and_gate andf(a, bnot, and1);
    not_gate at(a, anot);
    and_gate ands(anot, b, and2);
    or_gate end2(and1, and2, y);
endmodule