(A company manages a containerized application by manually deploying AWS compute instances. Which solution should be used to optimize the cost of the application?)

(Which two languages are used by CloudFormation to define infrastructure? Choose 2 answers.) 

(Which type of support plan provides a technical account manager and full use of Trusted Advisor?) 

(Which two solutions should an administrator use to receive emails when a Lambda function returns an error? Choose 2 answers.)

(A company is using CloudWatch on its EC2 instances. The company needs to determine the number of bytes received by an instance on all network interfaces for proper sizing of the instance. Which metric should the company use?)