(i) Other bulbs will glow with the same brightness.
(ii) When the bulbs are in parallel, wattage will be added (4.5 W) and the ammeter reading would be
I= P/V= 4.5 W/4.5V =1.0 Ampere
(iii) Since ammeter reading is 1.0 ampere, resistance of the combinatio., is 4.5/1.0 A=4.5Ω