12. (8 marks) A multiple-choice test has 10 questions, each of which has 4 possible answers. If a student guesses the answers, determine the probability of getting exactly: a) 5 answers correct b) 6 answers correct c) 1 answer correct d) all answers correct13. {6 marks} In a manufacturing business, [1.2% of the brake pads off the production line are considered defective. a} Determine the probabilityr that at least one brake pad is defective in an order of 200 pads. b} What is the expected number of defective brake pads in an order of 2M