Please clarify Phil 2:8-9 with reference to the Trinity

In Philippians 2:8-9 we read: >He [Jesus] humbled himself in obedience to God and died a criminal’s death on a cross. Therefore, God elevated him to the place of highest honor and gave him the name above all other names For many years I studied with the Jehovah's Witness, and now years later I still have trouble with the doctrine of the Trinity. Can you please clarify this passage for me: - If Jesus is God, how could he humble himself in obedience to God? (As God he could do no wrong and therefore could not be disobedient by definition?) - If Jesus is God, how could God elevate him [Jesus] to the place of highest honour? (Surely Jesus was already at the highest place because He is equal to God?)