Use the following information the answer the next two questions. A new drug used in the treatment of depression has a 70% success rate. A doctor prescribes the new drug to 80 of his patients. Let the random variable X be the number of patients out of 80 who have success with the new drug. Find the following. 2) Find the Expected mean and the standard deviation for the random variable x. a) Expected mean 56 and Standard Deviation is 4.1 b) Expected mean 25 and Standard Deviation is 16.8 c) Expected mean 16.8 and Standard Deviation is 56 d) Expected mean 24 and Standard Deviation is 4.1 el Expected mean 56 and Standard Deviation is 16.8