7. In each of the following situations, determine whether or not the person would be considered unemployed.

a. A 15-year-old offers to pet-sit, but no one hires her.

b. A college graduate spends the summer after graduation touring Europe before starting a job search.

c. A part-time teacher is only able to work two days a week, even though he would like a full-time job.

d. An automobile worker becomes discouraged about the prospects for future employment and decides to quit looking for work.