Answer:
Alex is part of the labor force, John is also part of the labor force.
Step-by-step explanation:
The labor force includes all those that are currently employed and those that are unemployed but searching for a job. The labor force does not consider the unemployed that are not searching for jobs.
With this understanding, Alex is part of the labor force because he applied to be a realtor. This indicates that even though he is currently unemployed and has not responded to interview requests from banks, he is interested in working as a realtor.
John is also considered to be part of the labor force, the only difference here is that he is now working part-time at the library, whereas, he worked as a full-time teacher.
Therefore, both Alex and John are part of the labor force