Consider a bank database handling multiple transactions concurrently. In a particular scenario, three transactions occur simultaneously: Transaction A: Customer X transfers $$500$ from their savings to their checking account.

$$ Transaction B: Customer Y withdraws $$300$ from their checking account at an ATM.

$$ Transaction C: Customer X deposits $$200$ into their savings account through an online transaction.

Given this situation, you are responsible for implementing a concurrency control mechanism to ensure data consistency and prevent anomalies such as lost updates, dirty reads, and uncommitted data access. Describe how the Two$-$Phase Locking $(2$PL$)$ protocol would manage these concurrent transactions.

Explain the importance of $2$PL phases in this process and how adopting Strict and Rigorous $2$PL could further enhance the consistency and integrity of this high$-$stakes banking environment. Use examples from the transactions above to illustrate the role of locks and how they help avoid potential data inconsistencies.