Use the hourly rates on the right (rounded to the nearest whole dollar) for 35 support employees in a private college to complete the frequency distribution and find the grouped mean. $15 $8 $6 $10 $11 $14 $12 . . . $14 $13 $17 $19 $22 $23 $27 $17 $16 $13 $6 $13 $12 $19 $26 $17 $16 $22 $16 $18 $12 $6 $15 $15 $14 $14 $12 $9 Complete the class frequency table below. Class interval Class frequency Midpoint 6-10 8 11-15 13 16-20 18 21-25 23 26-30 28 Total The grouped mean is $ . (Round to the nearest cent as needed.)