A company wants to implement their website in a virtual private cloud (VPC). The web tier will use an AutoScaling group across multiple Availability Zones (AZs). The database will use Multi-AZ RDS MySQL and should
not be publicly accessible. What is the minimum number of subnets that need to be configured in the VPC?
Since multi-AZ RDS needs 2 private subnets to provide high availability and 2 public subnets are needed for