Basic Calculus Exercises 1.1

Which explains what is meant by the equation $$\lim_{x\rightarrow2}f\left(x\right)=5$$  ?

is it possible that $$\lim_{x\rightarrow2}f\left(x\right)=5\ but\ f\left(2\right)\ =3?$$  

Which is the meaning of $$\lim_{x\rightarrow-3}f\left(x\right)=\infty?$$  

Which of the following is the meaning of $$\lim_{x\rightarrow3^+}f\left(x\right)=-\infty?$$  

From the graph, what is $$\lim_{x\rightarrow1}f\left(x\right)=?$$  

From the graph, what is $$\lim_{x\rightarrow3^-}f\left(x\right)=?$$  

From the graph, what is $$\lim_{x\rightarrow3^+}f\left(x\right)=?$$  

From the graph, what is $$\lim_{x\rightarrow3^{ }}f\left(x\right)=?$$  

From the graph, what is f(3)? 

From the graph, what is $$\lim_{x\rightarrow-7}f\left(x\right)?$$