A web application has a baseline usage pattern with predictable spikes during weekends. The spikes can be 5 times the normal load, and the application must scale accordingly. The company wishes to optimize costs while ensuring availability during peak times. Which combination of purchasing options should a Solutions Architect recommend for the most cost-effective architecture?
A full Savings Plan to cover all instance usage
A combination of Spot Instances for baseline traffic and On-Demand Instances for spikes
Reserved Instances for baseline traffic and On-Demand Instances for spikes
Using On-Demand Instances for both baseline and peak loads