What are the questions a person faces in the grave?

The grave is the first stage of the Hereafter, where the deceased will be questioned about their Lord, their religion, and their Prophet. The believer will be firm and have a bed laid out for them in their grave from Paradise, while the disbeliever will be unable to answer and will have a bed laid out for them from the Fire. The main questions are: Who is your Lord? What is your religion? And what do you say about the man who was sent among you (Muhammad, peace be upon him)?