In a box of floppy disks, 90% will work. If a sample of 10 floppy disks is selected at random: i. What is the probability that 7 of them will work? [1] ii. What is the probability that 2 of them will not work? [1] iii. Compute the expected number of the disks that will work from the sample. [1] iv. Compute the standard deviation for the number of the disks that will work from the sample. [1] c. A marketing company gets, on average, 20 orders per 500 calls. If a company calls 500 people, find the probability of getting 12 orders. Assume that the number of orders received by the telemarketing company is Poisson distributed.