Please help with this problems

3. What are large doses of fat soluble vitamins more likely to
be toxic than large amounts of water soluble vitamins give one
example of each

4. Describe the voyage a drop of blood from the right atrium of
the heart and back again. Name all the structures the drop passes
through on its way. It is not necessary to name all the arteries in
the systemic circuit but name the beginning artery and the final
vein entering the heart.