Explain the differences and coordination between useMemo, useCallback, and React.memo in React.

Imagine you are solving a difficult problem. useMemo = writing the answer on paper so you don't have to calculate it again next time. useCallback = keeping the same formula sheet instead of rewriting an identical one each time. React.memo = putting a sticky note on the child's door: "if the problem doesn't change, no need to redo it."