Depending on what water source you use, if your using faucet water your food will be clean but not totally.
If your using a lake, ocean, bodies of water your food will not be as clean, water from bodies of water are full of bacteria, and other contaminants.That being said, using a faucet is your best bet or even try to clarify water from bodies can help.
Answer:
AFTER THE FIRST REST, AFTER THE SECOND REST AS WELL, BEFORE THE THIRD REST, BEFORE THE BEAT ONE, END BAR...
Explanation:
He should lighten up his exercise just a bit to ensure he is not overloading his heart.