Answer:
Step-by-step explanation:
From the graph, we can see that the coordinate of z2 is (-4, -3) and that of z1 is (1,6) where;

We'll go ahead and use the below midpoint formula to determine the coordinates of the midpoint of z1 and z2;

Substituting the values into the above formula, we'll have;

Let's go ahead and plot the above point on the graph;