Can Christians Who Have Died Hear Our Requests for Prayer?

Questions about whether those in Heaven have a limited omniscience that enables them to hear our requests for them to pray for us, why Scripture comes before tradition for Protestants, and what people used for Scripture before Genesis was written.

• If moral perfection is a communicable property given to those in Heaven, wouldn’t it be reasonable to also speculate that limited omniscience is a communicable property, and so we can ask Christians who have died to pray for us?
• Why does Scripture come before tradition for Protestants?
• What did people before Genesis was written (Noah, Abraham, etc.) use for “Scripture”?