pls solve with explanation. thanks

(8 points) There's a faulty vending machine which, when you buy an item, has a one in three chance of giving you two of that item when you only pay for one. Annette buys a bag of chips from that machine every morning. In the upcoming work week (Monday through Friday), what's the probability that Annette will get a 'bonus' bag of chips on Monday, Wednesday, and Friday but not on the other days? In the upcoming work week (Monday through Friday), what's the probability that Annette will get a 'bonus' bag of chips on any three (and only three) of the days? Enter your answers as whole numbers or fractions in lowest terms