A shopper pushes a cart 21 m south down one aisle and then turns 90.0° west and moves 28 m. He then makes another 90.0° turn and moves 20 m.
a) What is the largest possible displacement of the shopper?
_______ m _______ degrees counterclockwise from west
b) What is the smallest possible displacement of the shopper?
_______ m _______ degrees counterclockwise from west