The graph of a function $f$ is given. Use the graph to find each of the following.

a$.$ The numbers, if any, at which $f$ has a relative maximum. What are these relative maxima?

b$.$ The numbers, if any, at which $f$ has a relative minimum. What are these relative minima?

n $29$

a$.$ Find the numbers, if any, at which $f$ has a relative maximum, and find the relative maxima$($maximum$).$ Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice.

n $30$

A$.$ The function $f$ has $($a$)$ relative maxima$($maximum$)$ at $3$ and the relative maxima$($maximum$)$ are$($is$).$

$($Use a comma to separate answers as needed.$)$

B$.$ The function $f$ has no relative maxima.

b$.$ Find the numbers, if any, at which $f$ has a relative minimum, and find the relative minima$($minimum$).$ Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice.

A$.$ The function $f$ has $($a$)$ relative minima$($minimum$)$ at $$ and the relative minima$($minimum$)$ are$($is$)($Use a comma to separate answers as needed.$)$

B$.$ The function $f$ has no relative minima.