For the function $g(t)=(t^2-4)(t^{2}1)$ find each of the following and interpret your result in complete sentences.

$4$A$)$ the values for $t$ for which $g(t)=0,$ please state exact values as points.

$4$B$)$ the values of $t$ for which $g^{\text{'}}(t)=0,$ please state exact values as points. $($Using derivative rules as needed$)$

$4$C$)$ Graph the original function, then include the appropriate tangent lines found at the location from part A$.$ Two colors may be useful, one for the original function and a different color for the tangent lines. I suggest a scale of $7$by$7$