I can try and help on this one, although I know this must be a bit late. For the multiple form one, pick whichever one is given to you on your assignment out of the both of them.
1.) Polite forms of できる -- できます / できります
2.) Polite forms of かえる -- かえます / かえります
3.) Polite form of たべる -- たべます 4.) Polite form of みつける -- みつけます
