Answer
(a) No.
(b) No.
(c) $X=g$
Work Step by Step
Use the configuration given in Example 3.3.11, we have:
(a) No. Because it is false that $w_1$ is above $g$.
(b) No. Because it is false that $w_2$ has a blue color.
(c) This question asks which block(s) is/are above $b_1$, thus we have the answer: $X=g$
