Please solve for me

6. Amanda has 6 different coins (a penny. pocket. She randomly picks 4 coins from her pocket. A. What are the values of n and r in this situation? n = ' i ,- = :1 B. How many different permutations of four coins can she pick? Show your work below. C. How many different combinations of four coins can she pick? Show your welk below.. ::3 a nickel, a dime. a quarter. a half-dollar. and a silver dollar) in her