5. What are the two major obligations that the state has to the federal

government?

As per the constitution, the two major obligation that the federal government  have over to the state government operating are as follows :

1. To protect the state government from any kind of invasion form some foreign enemy.

2. When requested to defend the state from regional aggression by the state legislature - or governor if the legislative is not in action.

general allotment act (dawes act) february 8, 1887

amendment to the dawes act, february 28, 1891

commission to the five civilized tribes (dawes commission), march 3, 1893

i would say the executive branch is because the executive branch is in charge of enforcing the laws and judicial branch is in charge of enforcing but the executive branch is most responsible for it all so i would have to say the executive branch.