A project manager is newly appointed to an ongoing project that will develop a new solution using an athliate of the company. The deploying resources will come from another entity of the company. When asked to confirm the availability of the deploying team, the deploying manager declined: What should the project manager do first? Refer to the project's resource management plan. Ask the project sponsor for external resources. Reschedule the project taking this new information into account. Create a change request to be validated by the project sponsor