1- It is not permitted. 2- It is like the previous issue. 3- Yes, you can ask all religious lawful matters from Allah.
There is no issue with this if the bag is carried with them. Furthermore, if the body is contaminated they should wash it if it is not too difficult for them, and if it is too difficult for them to wash their body, they can perform their prayer in whatever state they are in.
Travelers have the right to perform their prayers in al-Masjid al-Harām and al-Masjid al-Nabawi and also all of Mecca and Medina complete or shortened and complete prayer is better and there is no difference between old and new parts of Mecca and Medina.
The distance between the last house of the departure city and the first house of the destination city should be considered as the distance for prayer to be shortened.
Your going out of your house to the work place and then going to sail from there until reaching the destination are all consider as one travel.
If other people consider you just then there is no problem for you to be Imam of congregation.
Perform the number of prayers that you are certain you have missed with the intention of obligatory qaḍā and if you want to perform more than that, perform them with the intention of precautionary qaḍā.
Such fears and doubts are the insinuations of Satan. Don’t pay attention to that and attend the congregational prayer continuously.
Your prayers and fasting should be performed complete in both places.
This is not permissible, but it is permissible to sell them and use the money for other needs of the mosque.
It is not permitted, but if the person who devoted the land for the mosque has allowed it, it will be permissible. However, there is no issue with constructing things like libraries in the basement of the mosques.
This person can perform qunūt after rukū‘ and then go for sajdah without rukū‘ and continue the prayer.