please answer part C

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 tod. Mean a) 3X SD 13 X 80 b) Y+5 c) X+Y d) X-Y Y 10 5 CELLS a) Find the mean and standard deviation for the random variable 3X. E(3X) = 240 SD(3X)= 39 (Type integers or decimals rounded to two decimal places as needed.) b) Find the mean and standard deviation for the random variable Y+5. E(Y+5)= 15 SD(Y+5)= 5 (Type integers or decimals rounded to two decimal places as needed.) c) Find the mean and standard deviation for the random variable X+Y. E(X+Y)= 90 SD(X+Y)= (Type integers or decimals rounded to two decimal places as needed.)