Page 4 of 4 5. [12 pts] A commuter must pass through 4 different traffic lights on her way to work and will have to stop at each one that is red. She estimates the probability model for the number of red lights she hits, as shown below. X 0 1 2 3 4 P(X) 0.05 0.25 0.35 0.20 0.15 a. What is the probability she is stopped one time on her way to work? b. What is the probability she is stopped at least two times on her way to work? c. How many red lights should she expect to hit each day? d. What is the standard deviation