This is two questions I am stuck on if you know the answer or can help i would appreciate it thanks.

During the late 19th century, russia's settlement and development of siberia was made possible by the invention of the

If both the president and the vice president can no longer serve, who will become the next head of state?

Using the president's schedule, identify one example of the president using constitutional powers and fulfilling his duties. then, explain how and why that power is limited. give your answer in the form of at least three complete sentences.