You can find satisfying answers to those questions in chapter 11 of the book What Does the Bible Really Teach? published by Jehovah's Witnesses.
O ka bona dikarabo tse di kgotsofatsang tsa dipotso tseo mo go kgaolo 11 ya buka ya Totatota Baebele e Ruta Eng? e e gatisitsweng ke Basupi ba ga Jehofa.