a red die and a blue die are rolled. you win or lose money depending on the sum of the values of the two dice. if the sum is 3, 5, or 8, you win $5. if the sum is 2, 7, or 9, you win $1. if the sum is any other value (4, 6, 10, 11, or 12), you lose $2. let x be a random variable that corresponds to your net winnings in dollars. what is the expected value of x?