There are 4 questions in the project. The questions are located in the following packages respectively:

• com.tw.exam.questionSuperEasy
• com.tw.exam.questionEasy
• com.tw.exam.questionMeidum
• com.tw.exam.questionAnotherMedium

Please carefully read the Javadoc in the correspond method to get the basic idea of the requirement. You can also get hints from their unit tests. Please fulfill the requirements and try your best to pass all the unit test.

Please note that you can only modify codes within the <-start- and --end-->.

• All unit tests are passed.
• The code has correct layout.
• Good code quality.
  • Meaningful names of class, variable and functions.
  • Using full name rather than abbreviation.
  • Using appropriate data structure.