Normal Distribution Question, MDM4U. Please explain full work

2. a. b. c. d. For short domestic flights, an airline has three different choices on its snack menupretzels, potato chips, and cookies. Based on past experience, the airline feels that each snack is equally likely to be chosen. If there are 150 passengers on a particular flight, what is the approximate probability that: (3 marks, C) At least 60 will choose pretzels for dessert? (3 marks, A) Show that normal approximation is a good choice (3 marks, K) Exactly 60 will choose pretzels for dessert? (2 marks, A) Fewer than 60 will choose pretzels for dessert? (1 mark, A) If the airline has 70 of each type of snack available on the flight, what is the likelihood that a passenger will not be able to get the snack that he or she desires? (3 marks, A)