Residents of an Oceano mobile home park say the sidewalk just outside of their park is dangerous, and they've been unable to get answers as to who is responsible for fixing it.Sylvia Martinez lives in the Duna Vista Mobile Home Park in Oceano. She said her 600-foot commute on her mobility scooter to the bus stop becomes dangerous when she leaves the park.I couldn't go over the buckled sidewalk and so I had to drive on the highway here, Highway 1…