The life time of a man and his wife are independent exponentially distributed random variables with respective means 75 years and 80 years One of them has just died (41) Find the expected additional lifetime of the other member of the couple (42) Is the result above realistic? Discuss in not more than two sentences (43) If the result is in question 4 2) is unrealistic, what would be the reason? (10) (2) (2)