Line AB is the diameter of circle C. If the endpoints of the diameter are A(3, -4) and B(-2, 5), what are the coordinates of the center of the circle C?

I've forgotten how to do this, heh heh... help please?

The x and the y values of the midpoint (center) are the averages of the x and y values of A and B. The average x value of A and B is 1/2. The average y value is ___ .