Answer:

Hindi ko gets yung unang tanong pero try nadin.

The survey must be clear so that the respondents can easily understand each questions. If the questions are familiar to the respondents or she/he have background about the topic there's a chance that they will answer truthful and accurate response. But if the questions cannot recall the information the respondents still answer it but its not what your expected answer or they may answer untruthfully in order to move forward in the survey

After getting information from different sources, the researchers will compile all informations and get what important data so that they can summarize it.