In R please, thank you!

Question $4$

Suppose $E[x]=5,$ and Var$(x)=4.$ Find:

$a=E[(2+x{)}^2]$

$b=$Var$(3x+17)$

Provide your answer by assigning the value of $E[(2+x{)}^2]$ to the variable a$,$ and the value of

Var$(3x+17)$ to the variable $b.$ So if you think the answers are $0$ and $1,$ respectively, you

would write:

$a=0$

$b=1$

In $[37]$:

In $[35]$: ## Check whether a is correct $($hidden test$)$

In $[36]$: ## Check whether $b$ is correct $($hidden test$)$