4. ) From RN 7.2 and the following propositional symbols, construct a KB: "unicorn is mythical" Y I "unicorn is immortal" M "unicorn is mammal" "unicorn is horned" G “unicorn is magical" (a) Translate English sentences to logic. Think of the paragraph as the following sentences: If the unicorn is mythical, then it is immortal. (i) (ii) If the unicorn is not mythical, then it is a mortal mammal. (iii) If the unicorn is either immortal or a mammal, then it is horned. (iv) If the unicorn is horned, then it is magical.

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