A phone hotline at an NGO for prevention of domestic violence receives calls from men, women, and children who are in an abusive environment, An analysis of call records over time suggests that the mean number of calls registered by the hotline per month is 85. a. What is the probability that the number of calls made to the hotline on a given day is within one standard deviation from the mean number of calls? Assume 30 days per month. (Round to two decimal places.) b. An NGO researcher established that during the pandemic stay-at-home periods, the average number of calls to the hotline increased by 1016, What proportion of days during the quarantine period were characterized by at least 4 calls to the hotline? (Round to two decimal places.) C. For 7 randomly selected days during stay at-home periods, what is the chance that at most 3 of them would be characterized by at least 4 calls to the hotline? (Round to two decimal places.)