Hi, I need help with these questions

• The probability that a farmer is in debt is .80. What is the probability that three randomly selected farmers are all in debt?
• A survey conducted about job satisfaction showed that 20% of workers are not happy with their current jobs. Two workers are selected at random, and it is observed whether or not they are happy with their current jobs. What is the probability that of these two workers, at least one of them is happy with their current job?
• In a box, there are five doughnuts, and Alice takes two of them at random. Out of the five doughnuts, three are cream-filled, and two are not. What is the probability that Alice obtains exactly one creamed-filled doughnut in the two she takes out of the box?
• In how many ways can 5 differently colored marbles be arranged in a row?