Chapter 12.4, Problem 4QCE

Suppose that C is the graph of a smooth vector-valued function of $\text{r}\left(s\right)$ parametrized by arc length with $\text{r}\text{'}\left(0\right)=〈\frac{2}{3},\frac{1}{3},\frac{2}{3}〉\text{and}\text{r}\text{'}\text{'}\left(0\right)=〈-3,12,-3〉.$ Then

$\text{T}\left(0\right)=\text{\_\_\_\_\_\_\_\_,}\text{N}\left(0\right)=\text{\_\_\_\_\_\_\_\_,}\text{B}\left(0\right)=\text{\_\_\_\_\_\_\_}\text{.}$