A company has built its serverless solution using Amazon API Gateway REST API and AWS Lambda across multiple AWS Regions configured into a single AWS account. During peak hours, customers began to receive 429 Too Many Requests errors from multiple API methods. While troubleshooting the issue, the team realized that AWS Lambda function(s) have not been invoked for these API methods. Also, the company wants to provide a separate quota for its premium customers to access the APIs. Which solution will you offer to meet this requirement?