I wonder how the meter in the OM-4 would calculate the multi point spot metering. I know you can measure up to 8 points. But as an example of say 3 points. You have the camera on aperture priority say f/5.6 and the measurements are 1/1000, 1/125 and 1/30 for example. What shutter speed the OM-4 would pick as the average of the 3?