$7.$ What does runAppO do in a Flutter application?a$)$ Starts the Flutter engineb$)$ Configures the app themec$)$ Renders the root widget to the screend$)$ Launches an HTTP request$8.$ What does the Expanded widget do$?$a$)$ It aligns widgets vertically.b$)$ It expands a widget to fill available space in a Row or Column.c$)$ It displays a widget in fullscreen.d$)$ It animates a widget$\mathrm{.}9.$ What is the main entry point for a Flutter application?a$)$ initOb$)$ mainOc$)$ startOd$)$ appO$10.$ What is the default styling framework in Flutter?a$)$ Bootstrapb$)$ Material Designc$)$ Ant Designd$)$ Foundation$11.$ How do you define an immutable widget?a$)$ By using a StatefulWidgetb$)$ By using a Stateless Widgetc$)$ By using the Container widgetd$)$ By using the Stack widget$12.$ What is the purpose of the setState$)$ method?a$)$ To change the theme of the appb$)$ To rebuild the widget with updated datac$)$ To handle API callsd$)$ To navigate between screens$13.$ Which method is called when a StatefulWidget is removed from the widget tree?a$)$ initStateb$)$ disposec$)$ buildOd$)$ deactivateO