 If the exams and tests listed above show that the individual can take part in the study, and he or she chooses to take part, then the participant will take the study drugs for 8weeks. Heshe will take vemurafenib 240mg 4tablets twice daily for 56days and cobimetinib 20mg 3 tablets daily on days 1-21 and 29-49. While taking these pills, the following extra exams and tests will be needed. 