A federal judge approved a $75 million settlement in a class-action lawsuit brought against the NCAA on behalf of student-athletes at risk of developing concussion-related symptoms.In a written opinion this week, U.S. District Judge John Z. Lee gave final approval to a settlement calling for the NCAA to put $70 million in a medical-monitoring fund for athletes who played on or before July 15, 2016.That was the date Lee gave preliminary approval to the settlement.Under the monitoring program, athletes may be screened for …