In a 400 m relay race the anchorman (the person who runs the last 100 m) for team A can run 100 m in 9.8 s.?

His riva, the anchorman for team B, can cover 100 m in 10.1 s. What is the largest lead the team B runner can have when the team A runner starts the final leg of the race, in order that the team A runner not lose the race?|||2.9703 m