8. Suppose that the possible values of y are all cows. Let P(y) mean that y is brown, Q(y) mean that y is four years old, and R(y) mean that y has white spots. Translate the following statements into symbols. There is a brown cow. All cows are four years old. ) ) c) There is a brown cow with white spots. ) All four year old cows have white spots. ) There exists a cow such that if it is four years old, then it has no white spots. (f) All cows are brown if and only if they are not four years old. (g) There are no brown cows