Thanks, but how on earth would you imagine atheism demands faith? It is the absence of such faith. Atheism has no position on an 'ultimate source' by the way - that would be a question for theoretical physics.
This depends on the definition of "faith".
faith
noun \ˈfāth\
: strong belief or trust in someone or something
: belief in the existence of God : strong religious feelings or beliefs
: a system of religious beliefs
The first is definitely true for me, if not for all people to some extent. I trust in the scientific method and (typically) trust the consensus of the scientific community on issues.
I trust my senses. I trust my wife, I trust that solipsism is not true, etc.
In this way "faith" is better rendered "trust" though due to the tendency that many have for using it to refer to religion.
The second two?
Not a chance.