Answer: (6, -6)
Explanation:
so midpoint =(
,
)
for x co ordinate
=2
-2+X=4 (X2=x co ordinate point for b, can be written as just x now)
X=6
x co ordinate of B= 6
y co ordinates of y
=-7
-8+Y=-14
Y=-6
co ordinates B (6,-6)
for proof/extra explanation (NOT necessary for working):

=

=

=(2,-7)
which is the midpoint M