Please answer all parts Please be neat and show work I will

Please answer all parts. Please be neat and show work. I will rate you in a timely manner. Thanks:)

. Bulbs will glow brighter when connected in parallel. Brightness is considered to be a function of power delivered,

P = V²/R
Since V is constant, the lower resistance of the parallel circuit consumes more power.
The parallel circuit will provide 4 times the power of the series circuit. First option is correct. ie (Parallel)