Using the plural form when making dua in congregation

Q: When a person is reciting masnoon duas loudly wherupon others say "amin" (for example the imam after salah, at the time of nikah, etc), should he change the pronouns in the duas to plural form? For example, should he say "rabbi zidnA 'ilma" since he is making dua for the whole congregation? What would be the plural form of the dua "Rabb-irhamhuma kama rabbayaani sagheera"?

Inheritance

Q: My late dads estate needs to be divided Islamically. The following are the heirs:

Dadda (his father)

Mom (his wife)

7 daughters and

1 son (the children)

Please advise me how the shares must be divided Islamically.

Becoming a chartered accountant and taking bursaries from companies

Q: I am a grade 11 student and I want to pursue accounting after school. I am just concerned about whether being a charted accountant is permissible in Islam as it involves recording interest bearing transactions. The accountant is not involved in the actual interest bearing transaction but all he has to do is record it on, the businesses financial statements.

1. Is it permissible to become a charted accountant?

2. Is it permissible to take bursaries from large auditing firms in SA. They offer to pay for all your studies and you have to work with them for 3 years after you qualify. Is it permissible to work for these large auditing companies e.g. Deloitte and Tousche, PWC OR KPMG. They audit the books of large companies that also use interest.

3. Would mufti saheb suggest becoming a charted accountant?

Wife asking the husband for divorce and husband responding with "Ok, fine"

Q: If a woman says to her husband that "okay if you don't want to live with me than divorce me, the husband replied, "Ok, fine" ... does it imply talaq? If yes, than considering the ignorance of the husband that he doesn't know that saying this establishes talaq, still will it be considered as talaq?

Second question, if a husband says to his wife that I don't consider you as my wife. What does it mean? Is this also considered as talaq?

Zawaal time

Q: According to namaz chart, the time for zuhar salah in Islamabad is 12:23. I want to know how many minutes before this time will be considered as zawal time?

Remarrying despite the first husband revoking the talaaq

Q: I married a man in october 2013. We had some ups and down but Alhumdolillah we managed. Our nikah was not in knowledge of our parents. He was trying to explain his parents but his parents were asking for a Sayed girl as he is from a Sayed family. By that time my parents decided my marriage somewhere so I asked him to divorce me.

Now on 18th october 2016 he gave me one talaq but that time I didnt want to leave him and he too was not willing to leave me. After that we were in touch during my iddah as we couldn't control our desires. We used to have foreplay every other day and we had sex in December which was before my completion of my iddah.

Now I married other guy on 1st january 2017. I made sexual relationship with him too but it was during my menstual cycle but since 21st january, I am in UK and new guy is in Pakistan. My father knew about my first marriage but he didn't stop me from the second marriage. Now I got doubt that was my iddah of first marriage completed? Is my second marriage valid in islam? After having sex with my husband during my iddah period is our marriage reconciled? I don't want to go on path of sin.