1. b , 2. d and 3. b? These answers make the best sense to me personally. Also, you may want to number the questions or post them individually.
You will definitely need a <em>synth piano, a electric guitar, some good heavy banging drums, and pads.</em> If I am not that good at explaining I am sorry but I tried my best to tell you what I think should go into an electronic song because I'm a songwriter myself and I'm only 11! Have a great day!