answer in explanation,
a) I'll do this quick since you seem to know it,
We can assume that as we get more samples our data will approximate a normal curve with a mean of 60430 and a
In a normal distribution, 99.7% of samples fall within 3 standard deviations of the mean. with numbers outside this usually being considered outliers.
This would suggest that the highest value possible would be,
This would be the highest price based on the sample.
You mentioned 2 standard deviations, so if that is what the question suggests is the highest than that would be,
Hope this helped even though it is a bit late.