The Change Registration model should have the following states: Scheduled, Review, Closed, and Canceled. The initial state for the Change Registration model should be Scheduled.
1. Update the Change Registration model record to include all of the required states.
2. Add a model state transition to allow change requests following this model to move from Scheduled to Review, Closed, and Canceled.
Hint: Be sure to validate only one state model record is set as the initial state.
