Question: Consider the following logic program: rd(cons(H, cons(H, T)), T). rd(cons(H, T), cons(H,R)) rd(T,R). Give a top-down derivation, showing all substitutions for the query ask

Consider the following logic program:

rd(cons(H, cons(H, T)), T).

rd(cons(H, T), cons(H,R)) ← rd(T,R).

Give a top-down derivation, showing all substitutions for the query ask rd(cons

(a, cons(cons

(a, X), cons(B, cons(c,Z)))), W).

What is the answer corresponding to this derivation?

Is there a second answer? If yes, show the derivation; if not, explain why.

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