4 A survey is to be carried out to draw conclusions about the proportion \(p\) of residents of a town who support the building of a new supermarket. It is proposed to carry out the survey by interviewing a large number of people in the high street of the town, which attracts a large number of tourists.

1. Give two different reasons why this proposed method is inappropriate.
2. Suggest a good method of carrying out the survey.
3. State two statistical properties of your survey method that would enable reliable conclusions about \(p\) to be drawn.