Classify each of the following as employed, unemployed, or not in the labor force: (a) West works 70 hours per week as a homemaker for her family of nine. (b) Green was laid off as a carpenter when a construction project was completed. He is looking for work but has been unable to find anything except a job that paid $10 an hour, which he turned down. (c) Chang works three hours in the mornings at a clinic and for the last two weeks has spent the afternoons looking for a full-time job. (d) Martinez is vacationing in Florida during a layoff at a General Motors plant due to a model changeover, but he expects to be recalled in a couple of weeks.