Question 24
Find the volume of the set of points $(x, y, z)$ satisfying
$$
\begin{aligned}
x, y, z & \geq 0 \\
x+y & \leq 1 \\
y+z & \leq 1 \\
z+x & \leq 1
\end{aligned}
$$
$$
\begin{aligned}
x, y, z & \geq 0 \\
x+y & \leq 1 \\
y+z & \leq 1 \\
z+x & \leq 1
\end{aligned}
$$