1-Here is a set of documents:

D1= "Lucie has a pencil"

D2= "The house is red"

D3= "The red pencil is in the red house"

D4= "The red policeman is on leave with his red shoes"

D5= "After he left the house, the policeman left on his red bicycle"

For each word appearing in the documents, calculate the idf factor.

2-For a given user, we consider that only documents D2 and D3 are relevant given the query red house [2].

Calculate recall and precision for the following queries:

boolean model: house AND red;

boolean model: house OR red;