Question: students = { 1 :John, 2 :Bob, 3 :Ann } Please write a python code to do following action. 1 .

students ={"1":"John","2":"Bob","3":"Ann"}Please write a python code to do following action.
1. Add new student with id ="5", and name = "Mike"
2. Updated the student with id ="3" with name = Annie
3. How to retrieve student name from id ="2"?
4. How to remove the student with id ="1"?
5. How to check if the key =4 exists?

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