Given independent random variables, X and Y, with means and standard deviations as shown, find the mean and standard deviation of each of the variables in parts a to d a) X-11 b) 0.4Y c) X+Y d) X-Y a) Find the mean and standard deviation for the random variable X-11. EX-11)= SD(X-11)= (Type integers or decimals rounded to two decimal places as needed) Mean x 90 SD 14 Y 25 4