Sampson Corp. is evaluating the introduction of a new product. The possible levels of unit sales and the probabilities of their occurrence are shown next: a. What is the expected value of unit sales for the new product? (Do not round intermediate calculations and round your answer to the nearest whole unit.) Answer is complete but not entirely correct. b. What is the standard deviation of unit sales? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Answer is complete but not entirely correct