4) The Miller Electric Vehicle Company has projected the following data: Demand for Scooters Probability of This Demand Occurring Rate of Return if Demand Occurs Weak 0.05 -40% Below Average 0.15 -10% Average 0.50 15% Above average 0.25 30% Strong 0.05 50% a. Calculate the expected return for Miller stock: b. Calculate the variance for Miller stock: c. Calculate the standard deviation for Miller stock: