1) How can you group related classes in Java? 2) True or False: two classes are allowed to have the exact same name as long as they are in different packages. 3) How would you import every class in the java.util package without importing each one, one at a time? 4) True or False: all classes belong to some package. 5) Mark all statements that are valid "best practices" to use when writing code: Attempt to minimize the number of variables in your classes. Mark variables private where possible. Always initialize data. Break up classes with too many responsibilities into two or more other classes