In a software development company, the development team is working on a critical project that involves the creation of a web application to handle sensitive user data. The company emphasizes the importance of secure coding practices and robust authentication and authorization mechanisms. Please answer the following questions:

$($i$)$ Discuss any TWO $(2)$ significances of authentication and authorization in ensuring the security of a web application.

$($ii$)$ Based on your answer in $3($b$)($i$)$; Propose authentication methods suitable for the project,

considering factors like multi$-$factor authentication and secure password storage.

$($iii$)$ Outline an authorization strategy for the project