Two types of squirrels gray and black have been seen in pine valley. at the beginning of each year, we determine which of the following is true: the re are only gray squirrels in pine valley. there are only black squirrels in pine valley there are both gray and black squirrels in pine valley. there are no squirrels in pine valley over the course of many years, the following transition matrix has been estimated. grva0.7 0.2 0.05 035 iack 0.2 0.6 0.1 0.1 bom. c.1 0.: 0.8 0 vsth 005 0.05 0.1 0.s if currently gray squirrels live in pine valley, how many periods will pass before both squirrels live in pine valley