solve the problem

To study condition of SQU living in Al-khould area, 300 houses in AL-Khould were randomly selected. In each house information is recorded on, whether the house is rented by student or not . If it is then every student in each house is asked about when did he move in which region he comes from and how much he pays for rent . A) what is the population ? B) what is the source of the data (census, sample, experiment) C)Name the variables in the study and the type of data