Answer:
Leningrad, now known as Saint Petersburg
Answer: The confidence interval would be (82198.71, 103801.28).
Explanation:
Since we have given that
Mean = $93,000
Standard deviation = $17,000
n = 12 < 30
So, we will use 't-test' to find the 95% confidence interval,
Here , 
and 
So, according to t table, we get that

So, interval would be

Hence, the confidence interval would be (82198.71, 103801.28).