CSCV471 Propositional Logic (100 Points) 1. (56 points) Decide whether each of the following sentences is valid, unsatisfiable, or neither. a. Smoke Smoke b. Smoke Fire c. (Smoke >Fire) SmokeFire) d. Smoke v Fire v -Fire e. ((Smoke^ Heat)? Fire)~((Srnoke? Fire)v (Heat? Fire)) f. (Smoke=> Fire)=> ((Smoke^ Heat)=> Fire) h. (Big A Dumb) v-Dumb