Find the $y$-intercept and any $x$-intercept(s) of the parabola with equation ${y}={-3\!\left(x-3\right)^{2}+33}$. If the parabola doesn’t have any $x$-intercepts, type DNE, meaning “does not exist.” If the parabola has two $x$-intercepts, use a comma to separate them. Use decimals if needed. Round your answers to two decimal places.