Problem

Game: math quiz) Listing 3.1, AdditionQuiz.java, and Listing 3.4, SubtractionQuiz. j...

Game: math quiz) Listing 3.1, AdditionQuiz.java, and Listing 3.4, SubtractionQuiz. java, generate and grade math quizzes. Write an applet that allowsthe user to select a question type and difficulty level, as shown in Figure 18.30a. When the user clicks the Start button, the program begins to generate a question. After the user enters an answer with the Enter key, a new question is displayed. When the user clicks the Start button, the elapsed time is displayed. The time is updated every second until the Stop button is clicked. The correct count is updated whenever a correct answer is made.