Salmon Weights: Assume that the weights of spawning Chinooksalmon in the Columbia river are normally distributed. You randomlycatch and weigh 18 such salmon. The mean weight from your sample is19.2 pounds with a standard deviation of 4.7 pounds. You want toconstruct a 95% confidence interval for the mean weight of allspawning Chinook salmon in the Columbia River. (a) What is thepoint estimate for the mean weight of all spawning Chinook salmonin the Columbia River? pounds (b) Construct the 95% confidenceinterval for the mean weight of all spawning Chinook salmon in theColumbia River. Round your answers to 1 decimal place. < μ <(c) Are you 95% confident that the mean weight of all spawningChinook salmon in the Columbia River is greater than 15 pounds andwhy? No, because 15 is above the lower limit of the confidenceinterval. Yes, because 15 is below the lower limit of theconfidence interval. No, because 15 is below the lower limit of theconfidence interval. Yes, because 15 is above the lower limit ofthe confidence interval. (d) Recognizing the sample size is lessthan 30, why could we use the above method to find the confidenceinterval? Because we do not know the distribution of the parentpopulation. Because the sample size is greater than 10. Because theparent population is assumed to be normally distributed. Becausethe sample size is less than 100.