7. A sample was taken of the salaries of 20 employees of a large company. The following are the salaries (in thousands of dollars) for this year. For convenience, the data are ordered. 28 31 34 35 37 49 51 52 52 60 41 42 42 61 42 47 67 72 75 77 The first quartile for the salaries for this year is A) $34,000. B) $39,000. C) $48,000. D) $60,500.