Pls help me what is the answer

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

New york is the 27th largest state in the united states.what percent of the 50 states in the us are larger than new york