Name the octants in which the following points lie:
A (2, 3, 4), B (6, -3, 3), C (2, -1, -6), D (2, 2, -3), E (-1, 3, -6), F (-1, 3, 3), G (-3, -2,5) and H (-1,-2,-5).
A(2, 3, 4) : x>0, y>0, z>0
The point is in octant XOYZ or I
B(6, -3, 3): x>0, y<0, z>0
The point is in octant XOY'Z or IV
C(2, -1, -6) : octant XOY'Z' or VIII
D(2, 2, -3) : octant XOYZ' or V
E(-1, 3, -6): octant X'OYZ' or VI
F(-1, 3, 3): octant X'OYZ or II
G(-3, -2, 5): octant X'OY'Z' or III
H(-1, -2, -5): octant X'OY'Z or VII