$2\mathrm{.}1$ A function is used to represent the relationship between the number of users accessing a web server and the response time of the server.

The function is represented as follows:

$f(x)=$ Response time of the web server $($seconds$)$

$x=$ Number of users accessing the web server simultaneously

Discuss the domain and range of this function in the context of the scenario given above.

$(6$ Marks$)$

$2\mathrm{.}2$ Suppose that the function used in the scenario above is $f(x)=\frac{x^3+3x^2+6}{x^2+x-1}$ calculate the domain of the given function.

$(4$ Marks$)$