In a geometric progression consisting of positive terms, each term equals the sum of the next two terms. Then the common ratio of this progression equals

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The coordinates of points in the XY-plane are of the form __________.

Coordinate planes divide the space into _______ octants.

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).