Question: 1. Trace the backtracking + constraint propagation algorithm for finding an answer set of the program. p(a) :- not p(b). p(b) :- not p(a). q(a).

1. Trace the backtracking + constraint propagation algorithm for finding an answer set of the program.

p(a) :- not p(b).

p(b) :- not p(a).

q(a).

q(b) :- p(X), not r(X).

Note that the signature of the program above contains only two constants: a and b.

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