The masnoon dua of iftaar

Q: When should the following masnoon dua of iftaar be recited. Should it be read before one opens his fast or after one opens his fast?

اللَّهُمَّ لَكَ صُمْتُ وَعَلَى رِزْقِكَ أَفْطَرْتُ فَتَقَبَّلْ مِنِّي إِنَّكَ أَنْتَ السَّمِيعُ الْعَلِيم

Is it compulsory to follow the advice of a doctor?

Q: My question is regarding recent time of crisis when some of my fellow Muslims deny the lockdown and go to masjid. I try to convince them but need a proper basis. Somewhere I read, that it is mentioned in hadees, that If a person goes against the saying of doctor and eats prohibited things by doctor/expert which result to his death, it will be considered as suicide. Is it true? If yes, where is it mentioned.

Sharing in the profit as well as the loss in a mudaarabah contract

Q: I wish to do mudaarabah with a friend. I am the active partner. If I make a profit it'll be shared according to the percentage of profit agreed between us. However if I happen to make a loss, I take the responsibilty of returning the sleeping partner's money (capital). I take this guarantee. Is this halaal. If not please guide us to a legitimate way.