A computer maker receives parts from three suppliers, S, S2, S3. Fifty percent come from S, thirty percent from S, and twenty percent from S3. Among all the parts supplied by S, 5% are defective. For S and S3, the portion of defective parts is 4% and 3% respectively. (A) If a part is randomly ordered for a computer, what is the probability it comes from and is non- defective? (round to three decimal places) (B) If a part is randomly ordered for a computer, what is the probability it is defective? (round to three decimal places) (C) A customer complains that a certain part in her recently purchased computer is defective. What is the probability the part came from S3? (round to three decimal places)