• Zone, N = (sum of digits of your student id)% 8 

• For example, if your student id is 17301283,
   zone = (1+7+3+0+1+2+8+3) % 8 = 25 % 8 = 1

• Derive midpoint line drawing algorithm for a line in zone N.

• If you find zone 0, i.e., then drop the last digit from sum and take % 8 again.
  If your student id is 16240524, zone = (1+6+2+4+0+5+2+4)%8 = 24%8 = 0
  Updated zone by removing last digit 4 = (1+6+2+4+0+5+2)%8 =20%8 = 4
  
  

• Derive midpoint circle drawing algorithm for the arc of the circle in zone N.

• If you find zone 1, i.e., then drop the last digit from sum and take % 8 again.
  If your student id is 17301283, zone = (1+7+3+0+1+2+8+3)%8 = 25%8= 1
  Updated zone by removing last digit 3 = (1+7+3+0+1+2+8)%8 = 22%8= 6