Smith, Jones & Brown quarreled but, being gentlemen, decided to settle it by a 3-sided shootout until only one is alive. Smith is a perfect shot, Jones is 80% on target, & Brown only hits 50%. They roll dice to determine the order of the shootout, and then keep to the order until the bloody end. Every shooter gets to choose who to shoot, the order says who's first & second. What are their chances to survive?