An automatic machine inserts mixed vegetables into a plastic bag. Past experience revealed that some packages were underweight and some were overweight, but most of them had satisfactory weight. Weight % of Total Underweight 2.5 Satisfactory 90.0 Overweight 7.5 __________ 3. What is the probability of selecting two packages that are satisfactory? __________ 4. What is the probability of selecting three packages that are underweight? (Do not round answer.)