It is known that, across the adult population, the average number of words read per minute is 266 and the population standard deviation is 20. You work for a company with many employees across the country, and you would like to know what the average words per minute is for company employees. Your colleague proposes that he thinks the average will be the same as the average in the general population: 266. You decide to survey 100 employees, and find that in this sample the average words per minute is 269.21. a)Based on the assumption that the population mean is 266 and that the population standard deviation is 20, calculate the z-score of the sample mean in your survey. Give your answer as a decimal to 2 decimal places. z = b)Determine the proportion of the standard normal distribution that lies to the right of this z-score. That is, determine the area to the right of this z-score in the standard normal distribution. your answer as a percentage to 2 decimal places. Area = % c)Denote by x% the percentage proportion you calculated in part b). Consider the following five potential conclusions: A: There is a chance of x% that your friend is correct, that the true population mean is 266. B: If your colleague is correct and the true population mean is 266, then x% of all samples will produce a sample mean of 269.21 or lower. C: If your colleague is correct and the true population mean is 266, then x% of all samples will produce a sample mean of 269.21 or higher. D: There is a chance of x% that the true population mean is 266 or lower. E: There is a chance of x% that the true population mean is 266 or higher. Select the statement that can be inferred from your findings: A B C D E