Q. I’ve been asked to be a pallbearer at a funeral. What exactly is a pallbearer supposed to do? How many are there? And do I have to say yes? Frankly, I’ve only seen pallbearers in movies or on TV.   Pallbearers carry or accompany the casket at a funeral. They are friends, relatives, professional or business associates of the deceased—or sometimes members of the religious congregation. Pallbeare…