In the figure,if $P$ is $(2, 4, 5)$,find the coordinates of $F$.

Name the octant in which each of the following points lies:
$(i) (1, 2, 3)$
$(ii) (4, -2, 3)$
$(iii) (4, -2, -5)$
$(iv) (4, 2, -5)$
$(v) (-4, 2, 5)$
$(vi) (-3, -1, 6)$
$(vii) (2, -4, -7)$
$(viii) (-4, 2, -5)$

Find the distance between the following pairs of points: $(-3, 7, 2)$ and $(2, 4, -1)$.

The distance of the point $(1, 2, 3)$ from the $x$-axis is.......

The distance of the point $P(-3, 4, 5)$ from the $yz$-plane is: (in $\text{ units}$)

If the extremities of a diagonal of a square are $(1, -2, 3)$ and $(2, -3, 5)$,then the length of its side is