What is the correct order of parameters for the add_action() function?
add_action( 'example_function', 'example_hook', $priority )
add_action( 'example_function', 'example_hook', $priority, $accepted_args )
add_action( 'example_hook', 'example_function', $priority, $accepted_args )
add_action( 'example_hook', 'example_function', $accepted_args, $priority )