Hanna Öberg gave Sweden the lead at the final exchange and her sister Elvira kept her cool on the anchor leg to lift the Swedish women to a first-ever Olympic biathlon relay gold medal on Wednesday. Linn Persson, Mona Brorsson and the Öberg sisters won the 4×6-kilometres race in 1 hour 11 minutes 3.9 seconds after getting silver behind Norway four years ago. It was the third Beijing Games medal for Elvira Öberg after sprint and pursuit silvers. Hanna added gold to that from the 15km in 2018 and silver in the relay which also included Persson and Brorsson. The Russian team trailed by 12 seconds…