In analyzing hits by certain bombs in a​ war, an area was partitioned into 572 ​regions, each with an area of 0.85km2. A total of 505 bombs hit the combined area of 572 regions. Assume that we want to find the probability that a randomly selected region had exactly hits. In applying the Poisson probability distribution​ formula, ​P(x) = ​, identify the values of ​, ​x, and . ​Also, briefly describe what each of those symbols represents.