Write a program that administers and grades quizzes. A quiz consists of questions. There are four types of questions: text questions, number questions, choice questions with a single answer, and choice questions with multiple answers. When grading a text question, ignore leading or trailing spaces and letter case. When grading a numeric question, accept a response that is approximately the same as the answer. A quiz is specified in a text file. Each question starts with a letter indicating the question type (T, N, S, M), followed by a line containing the question text. The next line of a non-choice question contains the answer. Choice questions have a list of choices that is terminated by a blank line. Each choice starts with + (correct) or 

- (incorrect). Here is a sample file: 

T
Which Java reserved word is used to declare a subclass?

extends

S
What is the original name of the Java language?

- *7
- C--
+ Oak
- Gosling
M

Which of the following types are supertypes of Rectangle?
- PrintStream
+ Shape
+ RectangularShape
+ Object
- String
N

What is the square root of 2?
1.41421356

Your program should read in a quiz file, prompt the user for responses to all questions, and grade the responses. Follow the design process described in this chapter.