You are computing tf$-$idf scores for a document, $D$ within a larger training corpus $C.$

Suppose you have three words$---$buy, dog, and amazon$---$with the following count

statistics:

buy occurs $15$ times in document $D,$ and, in total, buy occurs in $50$ documents

in the corpus, $C.$

dog occurs $5$ times in document $D,$ and, in total, dog occurs in $40$ documents

in the corpus, $C.$

amazon occurs $1$ times in document $D,$ and, in total, amazon occurs in $1$

documents in the corpus, $C.$

Further suppose that the corpus $C$ contains $100$ documents. Compute the tf$-$idf

scores for these words. What would be their ranking $($in descending order of tf$-$idf

scores$)$: