create global secondary indexes, and change the capacity within an AWS Amazon DynamoDB. From the many available components, select two and answer the following questions for each using complete sentences:

1. What Amazon RDS database solutions are offered by Amazon and which one is the most widely used?
2. How are read replicas used within AWS? How would they be considered beneficial to an application?
3. What is the purpose of using an Amazon Shapshot and how do they logically work?