A random variable X is normally distributed with a mean of 100 and a variance of 100,

Question:

A random variable X is normally distributed with a mean of 100 and a variance of 100, and a random variable Y is normally distributed with a mean of 200 and a variance of 400. The random variables have a correlation coefficient equal to -0.5. Find the mean and variance of the random variable:
W = 5X + 4Y