Refer to the following for questions 17 to 19. A receptionist of a busy law firm estimates that phone calls arrive at her desk at a rate of 16 calls per hour during her typical work day. 17. What is the probability of her receiving more than two calls in a 15-minute period? (A) 0.908 (B) 0.238 (C) 0.012 (D) 0.999 (E) 0.762 18. Suppose in a morning her boss asked her to keep track of each call she can complete within five minutes, she then writes down in sequence a 1 for each call completed within five minutes or a 0 otherwise. If she completed 8 calls this morning, what is the number of different ways of 0s and 1s can appear in her records for the morning? (A) 56 (B) 28 (C) 128 (D) 16 (E) 256 19. If each call can be completed within five minutes with probability 0.6, what is the probability that exactly 4 calls out of the 8 from Question 18 are completed within five minutes? (A) 0.195 (B) 0.376 (C) 0.372 (D) 0.273 (E) 0.232