A company has deployed its AWS environment in a single AWS Region. The environment consists of a few hundred application VPCs, a shared services VPC, and a VPN connection to the company's on-premises environment. A network engineer needs to implement a transit gateway with the following requirements:
* Application VPCs must be isolated from each other.
* Bidirectional communication must be allowed between the application VPCs and the on-premises network.
* Bidirectional communication must be allowed between the application VPCs and the shared services VPC.
The network engineer creates the transit gateway with options disabled for default route table association and default route table propagation. The network engineer also creates the VPN attachment for the on-premises network and creates the VPC attachments for the application VPCs and the shared services VPC.
The network engineer must meet all the requirements for the transit gateway by designing a solution that needs the least number of transit gateway route tables.
Which combination of actions should the network engineer perform to accomplish this goal? (Choose two.)