(1 point) An online used car company sells second-hand cars. For 30 randomly selected transactions, the mean price is 2900 dollars. Part a) Assuming...

(1 point) An online used car company sells second-hand cars. For 30 randomly selected transactions, the mean price is 2900dollars. Part a) Assuming a population standard deviation transaction prices of 130 dollars, obtain a 99% confidence interval for the meanprice of all transactions. Please carry at least three decimal places in intermediate steps. Give your final answer to the nearest twodecimal places. Confidence interval: ( , ).