1. [5 points] A small accounting firm employs five clerks, three junior accountants, and one manager. Each clerk earns an annual salary of $35,000, and each junior accountant earns an annual salary of $70,000. If the manager earns an annual salary of $270,000, determine the mean and the median of the distribution of the annual salaries of the accounting firm's employees. 2. [15 points] On a certain aptitude test that children often take before beginning kindergarten, the scores of a reference population are normally distributed with a mean of 100 and a standard deviation of 15. a. Calculate the proportion of children from the reference population with scores that are less than 110 . b. Calculate the proportion of children from the reference population with scores that are between 80 and 115. c. Calculate the score on the aptitude test such that 2% of the children from the reference population have higher scores. d. Calculate the interquartile range of the distribution of scores of the reference population