15.6 The coefficient matrix [A] obtained in the moment method does not have one of these properties:
(a) It is dense (i.e., has many nonzero terms).
(b) It is banded.
(c) It is square and symmetric.
(d) It depends on the geometry of the given problem.
Answers: 15.1a, 15.2c, 15.3a, 15.4e, 15.5c, 15.6b, 15.7a, 15.8b, 15.9e, 15.10d.