A company runs its two-tier web application from an on-premises data center. The web servers connect to a PostgreSQL database running on a different server. With the consistent increase in users, both the web servers and the database are underperforming leading to a bad user experience. The company has decided to migrate to AWS Cloud and has chosen Amazon Aurora PostgreSQL as its database solution. The company needs a solution that can scale the web servers and the database layer based on user traffic. Which of the following options will you combine to improve the application scalability and improve the user experience? (Select two)