Three men (Tareq, Polash and Javed) and three women (Eliza, Aleya and Kanon) are spending a few months at a hillside. They are to stay in a row of nine cottages, each one living in his or her own cottage. There are no others staying in the same row of houses, a. Aleya, Tareq and Javed do not want to stay in any cottage, which is at the end of the row. b. Eliza and Aleya are unwilling to stay beside any unoccupied cottage. c. Kanon is next to Polash and Javed. d. Between Aleya and Javed's cottage, there is just one vacant cottage. e. None of the girls occupy adjacent cottages. f. The house occupied by Tareq is next to an end cottage. How many of them occupy cottages next to a vacant cottage?