What is the coordinate of midpoint of mr ? m4 and r10

Since the coordinates of m and r are not given, therefore, I cannot give an exact answer. However, I will help you with the concept

Suppose that we are given two points (

The midpoint can be calculated as follows:
x-coordinate of midpoint = 
y-coordinate of midpoint = 

Therefore, all you have to do to get the midpoint of MR is substitute with the coordinates of M ( and R ( in the above formula.

Hope this helps :)