The number of suits sold per day at a retail store is shown below with the corresponding probabilities. Find the mean, variance and standard deviation. Draw the graph of the probability distribution. Number of suits sold X 19 20 21 22 Probability P(X) 0.131 0.2238 0.4476 0.1976 If currently 4 suits are available in the stock and the manager of the retail store wants to be sure that he has enough suits for the next 8 days, how many should the manager purchase? Write an R program that can evaluate all the parameters and draw the graph as mentioned above. For prediction, number of days should not be fixed in the program. The program should allow the manager to estimate for any number of days chosen from keyboard]