The data in the table represents the wealth, in billions of dollars, of 6 people ...

(I) The data in the table represents the wealth, in billions of dollars, of 6 people.
17 24
17 23
21 29
Calculate the mean wealth

(II) For sample of size 5, construct a table of all possible samples and their sample means.
Wealth x
17,24,17,23,21
17,24,17,23,29
17,24,17,21,29
17,24,23,21,29
17,17,23,21,29
24,17,23,21,29
(b) For a random sample of size 5, what is the chance that the sample mean will equal the population mean? The probability is
(c) For a random sample of size 5, determine the probability that the mean wealth of the 5 people obtain will be within 1($1 billion) of the population mean.