Question 1: (20 points) (A) The number of mobile phones sold daily at MEGA electronics has the following probability distribution. 19 22 24 X: # of mobiles sold P(X=x) 18 0.4 0.2 0.3 0.1 a) What is the mean of the number of mobiles sold on a given day? 1 b) What is the variance of the number of mobiles sold on a given day? (B) A Pharmaceutical company claims that a new drug is effective against COVID-1960% of the time. The drug is tested on 24 selected patients. a) Use the Binomial distribution to find the probability that exactly 16 patients recovered from COVID-19? (Round your answer to the nearest thousandth). b) What is the mean of the number of patients who recovered from COVID-19? c) What is the variance of the number of patients who recovered from COVID-19