For a Poisson distribution with λ=2\lambda = 2λ=2, calculate P(X≤1)P(X \leq 1)P(X≤1).
e−2e^{-2}e−2
2e−22e^{-2}2e−2
3e−23e^{-2}3e−2
4e−24e^{-2}4e−2