Question 2: (10 Points)
To find the shortest distance from the intersection of $z = x - 1$ and $z = y - 1$ to the point
$(0, 0, 1)$, a minimization problem with two constraints can be formulated. Its solution is at
$(2/3, 2/3, -1/3)$, and the minimum distance is $\sqrt{\frac{8}{3}}$.
The values of the two Lagrange multipliers are $\lambda = \frac{4}{3}$ and $\mu = \frac{4}{3}$
Verify the given minimum distance by calculating it using a formula discussed in Chapter 10
(which includes the subject of points, lines, and planes in 3 dimensions).