HANOI, April 4 : Vietnam's economy slowed in the first quarter from the previous three months, data showed on Saturday, as its heavy exposure to Middle Eastern oil imports pressured growth. Gross domestic product grew 7.83 per cent in the January–March period from the same period a year earlier, below the fourth quarter's 8.46 per cent, the National Statistics Office said in a report. Vietnam's government is targeting at least 10 per cent this year for the Southeast Asian economy, but the goal