Lab #8 Presidents Quiz Toggle navigation

In this app, it will cover:
-Defining list variable for storing the questions and answers in lists.
-Sequencing through a list using an index; each time the user clicks “Next”, you’ll display the question.
-Using conditional (if) behavior: performing certain operations only under specific conditions. You’ll use an if block to handle the app’s behavior when the user reaches the end of the quiz.
-Switching an image to show diffrent picture for each quiz question.