A manufacturing company knows that their machines produce parts that are defective on occasion. They have 4 machines producing parts, and want to test if defective parts are dependent on the machine that produced it. They take a random sample of 321 parts and find the following results. Test at the 0.05 level of significance. Machine 1 Machine 2 Machine 3 Machine 4Defective 9 12 15 6Non-Defective 63 70 68 57