Metro’s guest-column series with the four gubernatorial candidates (Jill Stein, Tim Cahill, Charlie Baker and Deval Patrick) begins tomorrow. And for 10 weeks, beginning next week, we’ll pose your questions to the candidates. ... Want your question answered before you cast your ballot? E-mail justin.rice@metro.us to be included in our weekly Q&A segment with the candidates. Please include your name, town and phone number to be considered.