Implement the following navigation flow.

You start at a$.$jsf$,$ press a button, and randomly get either b$.$jsf or defeat.jsf$.$

From page $b_{,}jsf,$ after pressing a button you randomly get $c.js{f}_{?}$ or defeat.jsf$.$

From page c$.$jsf$,$ after pressing a button you randomly get victory.jsf or

defeat.jsf$.$

Note that since JSF navigation is based on forwarding, not redirects, when you

press a button, the URL of the previous page is shown in the browser but we

will fix this later.