LIST ALL OF THE THE SENTENCE FORMS (in exercise 3-4, p. 63) FOR WHICH THE TWO SENTENCES BELOW ARE SUBSTITUTION INSTANCES Don't write the sentence form--just write the letter which precedes it 1. ~~[(A --> ~A) v ~ B] 2. ~~A v ~ (B --> -C) a. P b. ~p c. pva d. pa e. - pv q f. ~ pa ~p~9 h. ~ (pvn) i. ~ (p) 9) j. ~(~ p. 9) k. (p v q) >r 1. pv (q) r) m. (~ pvq) >r n. ~ (pv q) >r 0. (pv q) ~r p. ~[pv (q) r)] q. ~[(pv q) ) r]