NEW BRUNSWICK, Canada — Seventeen-year-old Rebecca Schofield has three months to a year to live, doctors say. The bold Canadian teen in Riverview, New Brunswick, has cancer, and a final request. “I wanted to leave my mark. I wanted to do my part to change the world,” she says. After almost two years of chemotherapy, brain surgery and radiation, doctors told her the grim prognosis. Rebecca says that’s when she decided to come up with a bucket list.