To have a basic understanding on the concept of sampling, you will need a cup full of pebbles. Reach inside the cup and take a few pebbles out. Now, think of the pebbles as people that you will need to interview for your research. Those pebbles that you took out from the cup will be the ones who will participate in your interview. Take note that not all pebbles are included. Why do you think it is important to include only a portion of the pebbles and not all of them for your "interview"?​