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

endmodule

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

endmodule

// ============================================================
// XOR Gate
// ============================================================
module xor_gate (
    input  a, b,
    output y
);
wire c,d,e,f;
    not n1(c,b);
    not n2(d,a);
    and a1(e,a,c);
    and a2(f,b,d);
    or r1(y,e,f);

endmodule