Answer:
a. Jenna and Mary are both frictionally unemployed.
Step-by-step explanation:
Frictional unemployment is short-term in nature and arises as workers search for their first jobs or are moving between jobs. An example of frictional unemployment is a fresh graduate searching for their first employment. Frictional unemployment is the natural unemployment in the economy. It is caused by factors that lead to economic under-performance.
Shifts in the economy cause structural unemployment. It occurs when the skills available are not suited for the current job openings. Jenna and Mary have not been affected by changes in the economy. Their unemployment is natural and temporally.