help me with this statistics problem

Question 1 4 pts The average annual cost of healthcare in America is $10,500 with a standard deviation of $5,700. a) Based on this mean and standard deviation what is the probability that a random person spends more than $12,000 on healthcare this year? b) If you took a random sample of 40 individuals, what is the probability that the average spent by these individuals will exceed $12,000? c) Why is our answer to (a) not trustworthy, while our answer to (b) is acceptable? Edit View Insert Format Tools Table 12pt V Paragraph