For a group of four 60-year old men, the probability distribution for the number $\displaystyle {x}$ who live through the next year is as given in the table below.

$\displaystyle {x}$	$\displaystyle {P}{\left({x}\right)}$
0	0.0012
1	0.0206
2	0.1364
3	0.4006
4	0.4412

Verify that the table is indeed a probability distribution. Then find the mean of the distribution.
mean =
    Report answer accurate to 1 decimal place.