Referencing the image below, fill in the blanks for [a]-[d].

In the triangle above, M is the point of concurrency of the medians of a triangle. The term for point M is [a]. The medians of the triangle are concurrent at a point
that is of [b] from each vertex to the midpoint of the opposite side. Therefore, segment WM =[c]. If WM = 16 then WX=[d]