How do I organize this data into a grouped frequency distribution using 6 classes?

I know I need to:

1. Determine the highest and lowest values

2. Find the range: I got 797 as the range for this set of data. (is this correct?)

3. Determine the lower and upper class limits

4. Determine the class boundaries

5. Would I determine the frequencies?

What does the end result of this problem look like?

90 420 300 194 640 68 268 276 620 76 165 833 370 53 132

600 594 70 308 574 215 109 317 850 212

300 256 187