Mastering String Operations in Python

What will be the result of the following operation: `"hello".upper()`?

If `Y = "WORLD"`, what will `Y.lower()` return?

What does the function `Y.isupper()` return when `Y = "Python"`?

Given `Y = "123abc"`, what will `Y.isalnum()` return?

What will be the output of `len("Great Britain")`?

If `Y = "Hello, World!"`, what will `Y.find("World")` return?

What will `Y.isdigit()` return if `Y = "2023"`?

What is the result of `chr(65)`?

If `Y = "Python"`, what will `Y[1:4]` return?

What will `Y.replace("o", "a")` return if `Y = "Hello, World!"`?