And three other tricky workplace dilemmas. BY ALISON GREEN, INC.COM COLUMNIST Here's a roundup of answers to four questions from readers. 1. When your new hire is in jail on his first day My company hired a new person on my team. He was scheduled to start on a Monday but he pushed back a week at the last minute, and he didn't notify us until minutes before he was expected in. The next Monday he didn't come in, and no one could get in touch with him. We eventually discovered he was in jail. He claimed he was pulled over on the…