Suppose that customers enter a certain shop at the rate of 30 persons an hour. (i) What is the probability that during a 2-minute interval either no one will enter the shop or at least 2 persons will enter the shop. (ii) If you observed the number of persons entering the shop during each of 30 2-minute intervals, would you find it surprising that 20 or more of these intervals had the property that either no one or at least 2 persons entered the shop during that time?