Tomorrow's noon temperature (C) in Otaniemi is modeled with the random variable X1, which has an expected value of 16 and a standard deviation of 2.1 degrees. The corresponding temperature in Tl is modeled with a random variable X2, which has an expected value of 16 and a standard deviation of 1.7 degrees. The correlation of random variables X1 and X2 has been estimated at 0.4. Calculate the random variable M=12(X1+X2) (a) expected value (b) standard deviation.