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 nota, notb ;
    wire and1,and2 ;

    not_gate n1(a , nota);
    not_gate n2(b, notb) ;

    and_gate a1(a,notb, and1) ;
    and_gate a2(nota,b,and2) ;

    or_gate o1(and1,and2,y);
endmodule