In a survey of 106 resorts, it was found that:

• 32 had a spa
• 39 had a children's club
• 61 had a fitness center
• 13 had a spa and fitness center
• 9 had a spa and children's club
• 19 had a fitness center and children's club
• 5 had all three features

1. What is the probability that a resort had only a spa?
2. What is the probability that a resort had exactly one of the features?
3. What is the probability that a resort had none of the features?
4. What is the probability that a resort had at least one of the features?