According to the following usage example of the class (Mystery, which of the following method headers (with type contracts, without docstrings) are necessary to implement for Mystery to function as demonstrated below? Select all that apply.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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According to the following usage example of the class (Mystery,
which of the following method headers (with type contracts,
without docstrings) are necessary to implement for (Mystery to
function as demonstrated below? Select all that apply.
>>> m = Mystery('hello') - Mystery('world')
>>> m
<Mystery object at Ox1024fc850>
>>> print(m)
hello-world
>>> m.eject('Michael', 'Andi', 'Larry')
ejected
O def _init__(self):
O def _init_(self, x: str):
O def _repr_(self) -> str:
O def _str_(self) -> str:
O def _sub_(self, other: Mystery) -> str:
O def _sub_(self, other: Mystery) -> Mystery:
O def _neg__(self) -> str:
O def _dash_(self, other: Mystery) -> Mystery:
O def eject(x: str):
O def eject(x: str, y: str, z: str):
O def eject(self, x: str, y: str, z: str):
O def _neg_(self) -> Mystery:
Transcribed Image Text:According to the following usage example of the class (Mystery, which of the following method headers (with type contracts, without docstrings) are necessary to implement for (Mystery to function as demonstrated below? Select all that apply. >>> m = Mystery('hello') - Mystery('world') >>> m <Mystery object at Ox1024fc850> >>> print(m) hello-world >>> m.eject('Michael', 'Andi', 'Larry') ejected O def _init__(self): O def _init_(self, x: str): O def _repr_(self) -> str: O def _str_(self) -> str: O def _sub_(self, other: Mystery) -> str: O def _sub_(self, other: Mystery) -> Mystery: O def _neg__(self) -> str: O def _dash_(self, other: Mystery) -> Mystery: O def eject(x: str): O def eject(x: str, y: str, z: str): O def eject(self, x: str, y: str, z: str): O def _neg_(self) -> Mystery:
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