Hey, I need help with this:

4. (a) A survey shows that 20% of the items sold in a city's pawn shops are stolen. Susan purchases 5 items from one of the city's shops. Find the probability that (i) Exactly one of the items is stolen (ii) At most two of the items are stolen. (b) Hotel check in times follow a normal distribution with mean 12 minutes and standard deviation 2 minutes. Brenda has just arrived at the hotel. (i) What is the probability that Brenda takes more than 14 minutes to check in? (ii) What is the probability that Brenda takes between 10 and 15 minutes to check in? Brenda is in fact a bride and has invited 100 of her wedding guest to stay at the hotel (although she is not paying). (iii) How many of her guests would you expect to check in in over 11 minutes