Answer:
Wich one I can help maybe
Just draw one empty circle for 1 and then a filled circle for -1 so then it's 1-1 which equals 0
Shhdhdjdjdjejejdhehehehdhdhdhdhdhdhdhdhhd
Arc length = radius * central angle (in radians)
arc length = 63 * 2PI/9 radians
arc length = 14 PI