Identify the data redundancy from the following spreadsheet and provide examples of Update Anomaly, Insert Anomaly, and Delete Anomaly.

Employee	Hire Date	Manager	Manager Salary
Mary	011101990	Alice	80,000
John	10182000	Alice	80,000
David	05302004	Tony	90,000
...	...	...	...

NOTE: 'Manager' is the manager of that employee. An employee can have only one manager.