NEW DELHI: All central ministers have been asked to resume work in ministries from Monday and put together plans for post-lockdown period to kick-start the economy, sources said on Saturday.All ministries have been directed that joint secretary and above rank officers will resume work in respective departments, the sources said, adding that one-third of the essential staff members in every ministry need to be present.They said the government is focusing on hotspots of Covid-19 to contain the spread of the disease and on efforts to kick-start the economy once the lockdown is lifted.