A) An electron in a hydrogen atom has orbital angular momentum 5 hbar. What is the smallest total angular momentum it can have? Give your answer in units of hbar.
B) What is the highest total angular momentum it can have?
C) The electron is replaced by a negatively charged particle with intrinsic spin 2.5 hbar. It remains in the same orbit with orbital angular momentum 5 hbar. What is the highest angular momentum it can have?