Police in Fort Wayne were kept busy yesterday investigating not one, not two but three separate robberies.  The first happened at the Georgetown branch of Chase Bank at around 10:30 AM.  A man entered the bank and handed the teller a note demanding cash.  Then at around noon, someone held up the Burger Dairy convenience store on St. Joseph Boulevard.  Later in the day, just before 2;30 PM, someone held up the Dollar General on E. State Blvd.  Police are looking for clues and asking anyone who knows anything about the robberies to give them a call.