In analyzing hits by certain bombs in a war, an area was partitioned into 581 regions, each with an area of 0.95 km2. a total of 535 bombs hit the combined area of 581 regions. assume that we want to find the probability that a randomly selected region had exactly three hits. in applying the poisson probability distribution formula, p(x)equalsstartfraction mu superscript x baseline times e superscript negative mu over x exclamation mark endfraction , identify the values of mu, x, and e. also, briefly describe what each of those symbols represents.