In a stockpile, products are produced by three machines M1, M2 and M3, 40% and 30% were manufactured by M1 and M2 and the rest by M3. 3% of the products of M1 are defective, 1% of the products of M2 is defective, while 95% of the products of M3 are not defective. What is the percentage of defective products in the stockpile?