4.3 Simplify the following sets of literals, that is, for each set S find a simpler set S', such that S' is satisfiable if and only if S is satisfiable. lpq, qF, rs, ps], lpqr, q, pfs, qs, p), pqrs, qrs, prs, qs, ps lpq, qrs, pars, F, ql 4.3 Simplify the following sets of literals, that is, for each set S find a simpler set S', such that S' is satisfiable if and only if S is satisfiable. lpq, qF, rs, ps], lpqr, q, pfs, qs, p), pqrs, qrs, prs, qs, ps lpq, qrs, pars, F, ql