A company ships computer components in boxes that contain 20 items. Assume the probability of a defective computer component is 0.20. 13. Find the probability that the first defect is found in the seventh component tested. 14. Find the probability that the first defect is found in the third component tested. 15.A statistics professor finds that when they schedule their office hour at 10:30, a mean of 3 students arrive. Find the probability that on a randomly selected day exactly 5 students will arrive during this time slot. 16.A sales firm receives a mean of 4 calls per hour. For any given hour, find the probability that it will receive exactly 9 calls..