Distance and displacement

You can tell that an object is in motion relative to a

David walks 3 m North, and then turns back and walks 3 m South. What is his displacement?

Jack walks 3 km North, and then turns eastand walks 4 km. What is the total distance?

Victor runs exactly5 laps around a 400 m track. What is his distance?

Ray runs 30 feet North, 30 feet West and then 30 feet South. What is his distance?

Taylor rides her bike 20 m North, then rides the bike 15 m back. What is her displacement?

Paul went north 5 miles, and then west 3 miles and finally south 2 miles. What is its distance?

Jermaine runs exactly 2 laps around a 400 meter track. What is his displacement?