step by step way to change spark plugs in it

Hello nanaoffive-- This a a simple procedure. It's easy enough that you can tell your friends that you like working on your car. They may ask you for repair advice next time. Take a look at the description offered at this site--http://autorepair.about.com/cs/doityourself/a/blsparkplugs.htm. Remember to keep track of which wires go to which plug. Good luck from Bovan.

I don't know what idiots marked the other answer as helpful, but it doesn't help at all with answering how to get the back 3 spark plugs.