Create the and/or graph for the following problem. Why is it impossible to conclude the goal: r(Z)

Question:

Create the and/or graph for the following problem. Why is it impossible to conclude the goal:

r(Z) ∨ s(Z)?

Fact: p(X) ∨ q(X).

Rules: p

(a) → r

(a) and q

(b) → s(b).

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