Suppose a VLOOKUP formula was developed for looking up the values for the letter grades and quality points but that it returned values that were one letter grade too high. The likely error is that: 1) The columns in the VLOOKUP table are in the wrong order 2) The letter grades do not match the course average values 3) The values in the VLOOKUP table are sorted descending 4) The [range_lookup] argument in the formula has the wrong value