Answer and Explanation:
The classification is as follows:
a. It is a normative statement as it discussed that there is an efficient wages for all types of workers for earnings
b. It is a positive statement that depend upon the facts and proofs as the leisure for workers would create more unemployment as compared to before
c. It is a normative statement
d. It is a positive statement as the workers who are less skilled they can be settled for the minimum wages as they dont get the highest paying jobs because these jobs would be belong to those workers who are highly skilled