A company runs a three-tier application in AWS. Users report that the application performance can vary greatly depending on the time of day and functionality be...

A company runs a three-tier application in AWS. Users report that the application performance can vary greatly depending on the time of day and functionality being accessed.
The application includes the following components:
- Eight t2.large front-end web servers that serve static content and proxy dynamic content from the application tier.
- Four t2.large application servers.
- One db.m4.large Amazon RDS MySQL Multi-AZ DB instance.
Operations has determined that the web and application tiers are network constrained.
Which of the following is a cost effective way to improve application performance? (Choose two.)