Lowe Technology Corp. is evaluating the introduction of a new product. The possible levels of unit sales and the probabilities of their occurrence are given: Possible Market Reaction Sales in Units Probabilities Low response 20 .10 Moderate response 40 .20 High response 65 .40 Very high response 80 .30 a. What is the expected value of unit sales ( ) for the new product? (4 points) b. What is the standard deviation of unit sales (2 decimal places? (5 points)