Consider the following statements <Br> I) Hyperconjugation helps in increasing electron density at ortho an para sites in case of alkyl groups <Br> II) Electron donating groups are activators and are ortho and para directors because they stabilize the arenium cations. <Br> III) Electron withdrawing groups are activators and are meta directors because they stabilized the arenium cations. <Br> IV) Halogens are activators and ortho and para directors. <br> Select correct statements.