Pac-12 Networks' Ashley Adamson quizzes Cierra and Gabby Simpson, sisters on the Colorado women's volleyball team, to see if they truly know each other in the inaugural "Teammate Challenge." Follow along and see if the Simpsons can stay on top of the leaderboard with new episodes each Monday during "Pac-12 Sports Report" at 9 p.m. PT/10 p.m. MT on Pac-12 Network.