To find the midpoint you need to find almost the mean of your x and y coordinates. To find the midpoint of your x value, add the 2 x values together (6+2=8) and then divide by how many numbers there are (2) so it should equate to 8/2=4 as your x value midpoint. Do the same for y and you get the value 5 as your y midpoint so overall it should look like...
(4,5)