Plz help me I am really stuck on these

Refer to the list of words parts on the left to answer the questions. what prefix is used in the word incredulous? what suffix is used in the word incredulous? what word root is used in the word incredulous?

What is one way that the author makes a distinction between the first transcontinental railroad and the first transcontinental passenger flights in 1936

Who were the three first american novel list of major league chew statue in the early 19 century