$5\mathrm{.}1$ Using the fact that the derivative represents the slope $of$ the tangent line $to$ a graph, answer the

following questions about $p(x)$ based $on$ its graph:

$a.At$ which values $ofxis$ the derivative $ofp(x)$ equal $to$ zero?

$(2$ Marks$)$

$b.$ Determine where $p^{\text{'}}(x)>0.$

$(2$ Marks$)$

$c.$ Determine where