For a group of four 50-year old men, the probability distribution for the number who live through the next year is as given in the table below. I P(x) 0 0.0001 1 0.0029 2 0.0427 3 0.2776 4 0.6767 Verify that the table is indeed a probability distribution. Then find the mean of the distribution. mean = Report answer accurate to 1 decimal place.