多项选择题 Given: Which two are true? （）

单项选择题 A team of programmers is involved in reviewing a proposed design for a new utility class. After some discussion, they realize that the current design allows other classes to access methods in the utility class that should be accessible only to methods within the utility class itself. What design issue has the team discovered?（）

多项选择题 Click the Exhibit button. What two must the programmer do to correct the compilation errors? （）