The ratio in which yz-plane divides the line segment joining (3,4,5) ,(2,-3,1) is

The point dividing the join of (3, -2, 1} and (-2, 3, 11) in the ratio 2 : 3 is :

If (1,2,3), (2,3,1) are two vertices of an equilateral triangle then its third vertex is

A(0,2,3), B(2,-1,5), C(3,0,-3) are vertices of ABC. If  a,b,c are HG,GS,SH then their ascending order is