PARKCHESTER - Bronx residents attended a hearing Monday night on proposed Metro-North stations in the borough. The meeting, held by the MTA, was the fourth informational session on the plan. The agency has suggested that it would like to add train stations to Parkchester, Co-op City, Hunts Point and Morris Park. MTA officials say the project will cost more than $600 million and, if funded by the state, would begin in 2015 and end in 2019.