I sponsor my parents to immigrate Canada starting in 2007. They finally got medication exams in 2012. They got rejected because my father started to have Alzheimer. I filed appeal right away. My father passed away last year. Right now they inform me that the hearing will be hold soon. I am wondering if it is high possibility to get my mother immigrated to Canada. What should I do? My father is the premium applicant. Thank you in advance.