7. A company receives deliveries of a particular component from three suppliers. The following table gives the number of good and defective parts from each supplier as a proportion of total parts received. Component Supplier A B C Good 0.36 0.38 0.16 Defective 0.04 0.02 0.04 (a) If a component is selected at random from all those received, what is the probability that it is defective? (2 marks) (b) What is the probability that a component from supplier A is defective? (2 marks) (c) Is the quality of the component independent of the source of supply? (2 marks)