2. (9 points) A researcher wants to know how many hours children spo homework at all the elementary schools in the State of Oklahoma. Since the researcher is familiar with 5 elementary schools around her residence, she decides that she will contact the children from these five schools. a. What is the population? What is the sample? b. Offer one criticism about the researcher's choice of sample selecting. c. Will the external validity of the sample improve if the researcher decides to contact the children at 100 elementary schools around his residence instead of the original 5 schools? Why or why not