Question $2$

Consider a function $f(x)$ that takes a variable $x($say $x=1,2,3,4$ and computes the product of $x$ and $-$

$.$ What is the argmax of the function?

None of these

argmax for the $f(x)$ is $12$

argmax for the $f(x)$ is $16$

argmax for the $f(x)$ is $4$