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 a_bar,b_bar,a1,a2;
    not_gate n1(a,a_bar);
    not_gate n2(b,b_bar);
    and_gate ag1(a,b_bar,a1);
    and_gate ag2(b,a_bar,a2);
    or_gate o1(a1,a2,y);

endmodule