Define a class `Speaker` with a method `speak` that takes `self` and a `message` string as parameters. The method should print the message. Instantiate `Speaker` and call `speak` with “Hello World”.
None
Print the message.
None
Hello World
The `self` parameter allows methods to access the instance they are called on.
class Speaker:
# Define the speak method here
pass
# Instantiate and call speak
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