Tourism Queensland monitored the duration of calls to its customer service line. Over several years, they found that the length of a phone call could be modelled as a normal distribution with a standard deviation of 1.76 minutes. Find the probability that the length of a phone call of a randomly selected customer would be within two minutes of the true mean length ofa phone call (correct to 3 decimal places) If 439 phone calls were received during a particular shift, how many phone calls would be within two minutes of the true mean length ofa phone call? Use your rounded answer, with 3 decimal places, from part a. (Round your answer to the nearest whole number.}