According to Jehovah's Witnesses is Jehovah God omnipotent, omniscient, and omnipresent?

In talking to Jehovah's Witnesses I found it difficult to discover what they believed on these three attributes: Omnipotent - God cannot be thwarted by the Devil, sin, sinners, or the world but is all-powerful in all things. Omniscient - God knows all things about all things, past, present and future, all the time. Nothing escapes his knowledge, including our thoughts & motives. Omnipresent - God is in all places, at all times, in the fullness of his being. It is not just a bit of God everywhere, but _all_ of God is everywhere _all the time_. So he does not need angels or anyone else to inform him of anything anywhere at any time. What is the Jehovah's Witness belief on these matters?