First name
Adam+Students (3)
School
Torlands
Country
Age
0
1a) 31,32,33,34
1b) -11,-10,-9,-8
2) 5,6,7,8
3) It will always be 0.
b=a+1
c=b+1 = a+2
d=c+1 = a+3
(a+d) - (c+b)
(a+a+3) - (a+2+a+1)
(2a+3)-(2a+3) will always be 0.