I think the answer is
B) All of these are corrects
All of the above its all right
Pretty sure it's outer core, lower mantle because the inner core is solid iron
Answer:

Explanation:
Given:

Required:
Coordinates of the Midpoint of HX
Solution:
Midpoint (M) of HX, for
is given as
.
Let 

Thus:

Convert to improper fractions




