The question: “What doth the Lord require of thee?” has one easy answer. It is there in Micah: “… to do justly and to love mercy and to walk humbly with thy God.” But the question is prefaced by a statement: “He hath showed thee, O man, what is good.” So I take it Micah asked the question rhetorically.
The best sermon that I ever heard preached on the text from Micah was the speech of a Quaker lawyer who was being installed as the judge of a county court in a large, populous and notoriously corrupt county. The reason it was a good sermon was that this judge saw and candidly faced the fact that there was no way for him to fulfill the affirmation he had just made to the State and also follow fully his own personal interpretation of justice, mercy, and humility before God. Yet he hoped he would not forget, he intended not to forget, that this was the Lord’s requirement of him.