Dingdong and Dante are carrying an office table. Dingdong has to exert a much greater force than Dante does to keep the office table level. Is the table's center of mass closer to Dingdong or to Dante? Explain your answer (Broad explanation) Which is more difficult to do - sit-ups with your hands placed behind your head or sit-ups with your hands on your stomach? (Broad explanation) Thank youu