Zikr & Dua

Q: 

1. Please clarify if the dua for eating has wa ala barakatillah or if it is just wa barakatillah without ala, which one is Sunnah and rewarding?
2. The dua after eating is it wajaalana minal muslimeen or wajaalana muslimeen, which one is Sunnah and rewarding?

​Please write the duas in Arabic with Harakat and reference from Hadith.

Q: Can one seek the help of angels thinking that if they are nearby they can help?

Q: When are the best times to read Hizbul Bahr and Hizbul Nasr? Who can give me permission to read them?

Q: I have started reciting Ayat-e-karima and want to complete 125000. So, should I recite it in wudu or I can recite it anywhere, anytime?

Q: What are the duas that should be made while preparing for exams? I have searched online for duas but I'm not sure if they're authentic or not. I fear that they might result in bida'.

Q:

1. Are Duas accepted yes or no - my answer would be 1) Its answered now 2) It may be answered in future 3) You will get it answered in Hereafter. 
2. What about statements (ahadeeth) ALLAH has forgiven and made you enter jannah and saved you from Hell.  Its like Jesus pbuh dying on cross or something a little like that.