How might each of the following be interpreted as an example of rent provision by government?
a. State laws require that out-of-state big-game hunters be accompanied by one of a limited number of licensed in-state hunting guides.
b. An increase in the minimum wage increases the likelihood that firms will hire skilled unionized labor rather than unskilled labor.
c. A state law requires that graduates of dental schools pass a stringent examination, established by a panel of dentists, in order to practice dentistry.