The number of blackflies on a broad leaf follows a Poisson distribution with mean $2.$ A plant inspector, however, records the number of flies on a leaf only if at least $1$ fly is persent. What is the probability that he records $1$ or $2$ flies on a randomly chosen leaf? What is the expected number of flies recorded per leaf? $[$Hint: $x$ Poisson $[$:$()Longleftrightarrow{p}_x(x)=e^{-}\frac{{}^x}{x}!,x=0,1,2,$cdots,$E(x)=$