7. [6 marks] An employer was interested in the relationship between his employees' age and their annual salary. He divided all his employees into three age groups and then selected a random sample of employees from each of three age groups: \"Under 30", \"Between 30 and 50\c) [2 marks] Obtain the expected count (is. expected frequency) for the cell \"Under 50 and Under $60,000\" and explain what it represents in the context of the question. d) [1 mark] The employer calculated the Chi-Square statistic by hand, and found a Chi-Square statistic of -2.38. He knew that this answer was not correct immediately. Explain (in one sentence) what is wrong with this Chi-square statistic