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On the curve `\vec{r}(t)=\langle t,t^2,4 \rangle`, when `t=1`,

T`(1)`=`\langle \frac{1}{\sqrt{5}},\frac{2}{\sqrt{5}},0 \rangle`, and that N`(1)`=`\langle \frac{-2}{\sqrt{5}},\frac{1}{\sqrt{5}},0 \rangle`.

(Note that the curve lies entirely in the plane `z=4`.)

(a) Find the i component of `B(1)`, the binormal vector.

(b) Find the j component of `B(1)`, the binormal vector.

(c) Find the k component of `B(1)`, the binormal vector.