Added hints file.

Author: BethanyG

exercises/concept/meltdown-mitigation/.docs/hints.md

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+# Hints
+
+## General
+
+- The Python Docs on [Control Flow Tools][control flow tools] and the Real Python tutorial on [conditionals][real python conditionals] are great places to start.
+- The Python Docs on [Boolean Operations][boolean operations] can be a great refresher on `bools`, as can the Real Python tutorial on [booleans][python booleans].
+- The Python Docs on [Comparisons][comparisons] and [comparisons examples][python comparisons examples] can be a great refresher for comparisons.
+
+## 1. Check for criticality
+
+- Comparison operators and boolean operations can be combined and used with conditionals.
+- Conditional expressions must evaluate to `True` or `False`.
+- `else` can be used for a code block that will execute when a conditional test returns `False`.
+
+  ```python
+     >>> item = 'blue'
+     >>> item_2 = 'green'
+     
+     >>>  if len(item) >=3 and len(item_2) < 5:
+            print('Both pass the test!')
+          elif len(item) >=3 or len(item_2) < 5:
+            print('One passes the test!')
+          else:
+            print('None pass the test!')
+    ...
+    One passes the test!
+  ```
+
+## 2. Determine the Power output range
+
+- Comparison operators can be combined and used with conditionals.
+- Any number of `elif` statements can be used as "branches".
+- Each "branch" can have a separate `return`
+
+## 3. Fail Safe Mechanism
+
+- Comparison operators can be combined and used with conditionals.
+- Any number of `elif` statements can be used as "branches".
+- Each "branch" can have a separate `return`
+
+
+[python comparisons examples]: https://www.tutorialspoint.com/python/comparison_operators_example.htm
+[boolean operations]: https://docs.python.org/3/library/stdtypes.html#boolean-operations-and-or-not
+[comparisons]: https://docs.python.org/3/library/stdtypes.html#comparisons
+[python booleans]: https://realpython.com/python-boolean/
+[real python conditionals]: https://realpython.com/python-conditional-statements/
+[control flow tools]: https://docs.python.org/3/tutorial/controlflow.html
+