Most books/articles I've read about query letters recommend that your last paragraph mention your bio/credentials. I don't want to mention anything irrelevant, and I don't have any real experience in the field. My degrees and career are all totally unrelated to writing. Should I mention that 1) I've been writing since I was very young or that 2) I was published by a college magazine? Or are those things irrelevant too? If I can't mention those things, should I include ANYTHING in the bio, or just skip it altogether? Thanks!