Jamaat Salaah and Imaamat

Correcting the imaam

Q: What is the condition of the salaah if the imam makes the following mistakes

1. In takbeer the kaaf is read with a kasra

2. In fatiha, the laam of Alhamdu is read with a fatha

3. In Tasmee the meem of samia is pulled a little

4. In the last Ayah of surah nasr, the word rabb is omitted thus reading: bihamdika

Imaam informing the congregation that the salaah has to be repeated

Q: One day I was leading three people in zuhr prayer. In my second last rakaat I felt like something was coming out from my private part. I still continued with the prayer. After I finished I went to the toilet and I found it was mazi. I came back after I washed myself and made wudhu but the people we prayed together with were gone. I don't know where to find them because it was a market where we prayed. I don't know them at all. I then observed the prayer alone again. So what should I do about them?

Following the Jamaat Salaah of the Haram from the Hotel Jamaat Khaana

Q: Nowadays, some people are performing salaah in the hotel near the Musjid al Haraam while following the jamaat of Musjid al Haraam. The hotel has speakers installed and the recitation of the Imaam of Musjid al Haraam can easily be heard. However, since the Imaam is not present infront of the muqtadis, I am doubting whether the salaah is valid or not. Is it permissible for people to follow the Imaam in salaah while in their hotel rooms? Similarly, is it permissible to follow the Imaam in the hotel jamaat khaana?