You are designing a VPC architecture for your organization using a Network Connectivity Center hub-and-spoke topology:

• One Network Connectivity Center hybrid spoke exists to receive on-premises routes (172.16.0.0/16).
• One additional VPC spoke needs to be added as a Network Connectivity Center spoke.

Your organization has constrained routable IP space (192.168.0.0/20) for its cloud environment. The spoke VPC is connected to on-premises via a Cloud Interconnect in us-east4.

How should you configure the architecture to enable access to on-premises resources from multiple Google Cloud regions (us-west1, europe-central1, and asia-southeast1) while minimizing IP address usage?