Task $2\mathrm{.}1$

What are the possible values of $x$ as a result of the following block?

How do you modify from the above block such that xin$\{-1,1\},$ i$.$e$.,$ the value of $x$ is either $-1$ or $1?$

How can you generate a random integer xin$\{0,1,2\}$ but instead of equal probabilities, the

probabilities of getting $0,1,2$ are $0\mathrm{.}25,0\mathrm{.}5,0\mathrm{.}25$ respectively?

What are the possible values of $y$ as a result of the following block?

How do you modify from the above block such that yin$\{1\mathrm{.}5,2\mathrm{.}0,2\mathrm{.}5,3\mathrm{.}0,3\mathrm{.}5,4\mathrm{.}0\}?$