Consider the code snippet below, and conduct the basis path testing to analyse all the independent paths:App A is a database management tool. There are three basic functions $-$ Add, Save, and Delete $-$ that allow users to enter data or delete a row. In a new build, an 'Update' feature has been introduced to allow users to edit the changes and save the input. During testing a QA specialist will have to determine if the introduction of a new feature has impacted the way the 'Add', 'Save', and 'Delete' buttons work. What testing methodology will be suitable for the mentioned situation. Explain how to execute the identified test cases based upon the risk and impact analysis.