A company has recently migrated their application from an on-premises environment to AWS. The application's frontend consists of a static website hosted on two Amazon EC2 instances, which are placed behind an Application Load Balancer (ALB). The backend of the application is a Python application running on three EC2 instances, also managed by an ALB. These EC2 instances are large, general-purpose On-Demand Instances, configured to match the peak usage specifications of the original on-premises setup. The application handles hundreds of thousands of requests monthly, with the majority of traffic occurring during lunch hours, while experiencing minimal traffic throughout the rest of the day. A solutions architect is tasked with optimizing the infrastructure costs of this application without compromising its availability. Which two steps should the solutions architect take to achieve this goal?