Chapter 8.6, Problem 2PP

To determine

To show that: The B-spline does not end at ${\text{p}}_3$ but $\text{x}\left(1\right)$ is in $\text{conv}\left\{{\text{p}}_1,{\text{p}}_2,{\text{p}}_3\right\}$ and find the affine coordinates of $\text{x}\left(1\right)$ with respect to $\left\{{\text{p}}_1,{\text{p}}_2,{\text{p}}_3\right\}$.