Find any relative extrema of the function. List each extremum along with the $x-$value at which it occurs. Identify intervals over which the function is incre which it is decreasing. Then sketch a graph of the function.

$G(x)=-x^3+x^2+x+1$

Describe any relative extrema. Select the correct choice below and, if necessary, fill in the answer box$($es$)$ to within your choice.

A$.$ The relative minimum point$($s$)$ is$/$are $(\frac{1}{3},)$ and the relative maximum point$($s$)$ is$/$are $($Simplify your answers. Type ordered pairs, using integers or fractions. Use a comma to separate answers as needed.$)$

B$.$ The relative maximum point$($s$)$ is$/$are and there are no relative minimum points. $($Simplify your answer. Type an ordered pair, using integers or fractions. Use a comma to separate answers as needed.$)$

C$.$ The relative minimum point$($s$)$ is$/$are and there are no relative maximum points. $($Simplify your answer. Type an ordered pair, using integers or fractions. Use a comma to separate answers as needed.$)$

D$.$ There are no relative minimum points and there are no relative maximum points.