Q$8$ There are three documents, each document contains $1$ sentence.

Doc$1$: "a dog barked at me today"

Doc$2$: $"$it is a scary dog"

Doc$3$: $"$it snows a lot in Russia"

a$.$ Manually generate document$-$term matrix, using only Unigrams. The index of each word should be sorted alphabetically. For example, word $"$a$"$ should be indexed $0.$ Word $"$at$"$ should be indexed $1.$

b$.$ Identify two words that will be weighted down after using inverse document frequency $($IDF$)$

$\backslash$table$[[,,,],[,,,],[,,,],[,,,],[,,,],[,,,],[,,,],[,,,],[,,,],[,,,],[,,,],[,,,]]$