Milwaukee police are working four separate Friday shootings which took place over a five-hour period.  One man was killed and five more suffered wounds.  The first shooting was at 11:00 a-m and the final one at 4:00 p-m.  A 22-year-old man was shot to death while he was sitting in a car at about 1:00 p-m.  No names have been released and police have announced no arrests yet.  They say one man suffered a serious injury when he was shot while sitting at a red light.  The other four gunshot victims are expected to survive.  Police don’t think the shootings are related.