I need help with these homework problems

1. Identify the population and the sample. Describe the sample data.

a. A survey of 1100 travelers worldwide found that 53% of respondents with pets travel with their pets.

b. A survey of 1029 U.S adults found that 23% of those suffering with chronic pain had been diagnosed with a sleep disorder.

2. Identify the sampling technique used, and discuss potential source of bias

a. Every tenth person entering a mall is asked to name his or her favortie store.

b. Soybeans are planted on a 48- acre field. The field is divided into one-acre subplots. A sample is taken from each subplot to estimate the harvest.