Answer
a. λ=0.8
P P(x=0) =$\frac{0.8^{0}e^{-0.8}}{0!}$=0.4493
b. see table
c. μ = λ = 0.8
$σ^{2}$=λ = 0.8
σ=$\sqrt 0.8$ = 0.8944
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