The 80-year-old former singer for The Platters was found on Wednesday after vanishing in Brooklyn on Friday. Sandra Hall, who performed with the legendary vocal group in the 1960s, was last seen around 4 p.m. near Atlantic Terminal after visiting the mall with her caretaker. Her family confirmed she was found in New York Presbyterian Hospital and is doing well. She was found after the family received a tip that she may be in the Bronx. “It checks out because she hopped on the 2 train going Uptown,” her daughter, Star DaSilva, wrote on Facebook. After finding her mother, DaSilva updated her post, stating “she was picked up the very same night she left by police officers and taken to a hospital.” Hall, who has dementia, became…..