Kant
{ 1 } - is an empiricist in ethics.
{ 2 } - thinks that we learn what is right and wrong from sense experience.
{ 3 } - is not a rationalist in ethics.
{ 4 } - thinks the morality is based on belief in God.
{ 5 } - thinks that we are aware of moral obligation even without belief in God.
That is empiricist ethics.