A web-based travel agency uses its website to market its travel products [holiday packages). The agency receives an average of six web-based enquiries per day for its different travel products. a. What is the probability that, on a given day, the agency will receive at most three web-based enquiries for its travel products? b. What is the probability that, on a given day, the travel agency will receive two or five web-based enquiries for travel packages? c. What is the probability that the travel agency will receive at least 2 web-based enquiries for travel packages on a given day? d. What is the probability that the travel agency will receive no more than two web- based enquiries for travel packages in a half-day period