Let w1, w2, and w3 represent three words in the dictionary of an inverted index. Suppose we have the following document frequency distribution:

Let w₁, w₂, and w₃ represent three words in the dictionary of an inverted index. Suppose we have the following document frequency distribution:

Assume that each posting entry of document ID and term frequency takes exactly the same disk space. Which word, if removed from the inverted index, will save the most disk space?