If one is rated 3.0, 3.5 and 4.0, then what is the range for each rating?? i.e. is it 2.5 - 2.75 for a 3.0??? Also, if one self-rates at 3.5, then what is the rating does one start out at prior to their first match?? Is it 3.50, or is it at the bottom of the 3.5 range?