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 p1,p2;
   wire n1,n2;
   not_gate NA(a,n1);
   not_gate NB(b,n2);

   and_gate a1(a,n2,p1);
   and_gate s2(n1,b,p2);

   or_gate o1(p1,p2,y);

endmodule