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.
This person can perform qunūt after rukū‘ and then go for sajdah without rukū‘ and continue the prayer.
None of them is necessary and the verbal declaration of the intention is not permissible as an obligatory precaution.
1- It is not permitted. 2- It is like the previous issue. 3- Yes, you can ask all religious lawful matters from Allah.
You should perform the sign prayer for each earthquake that is felt, but if it repeats during the prayer then that prayer will suffice. If repeating the Sign prayer causes considerable hardship for you, then you can perform it as much as is convenient for you.
This act is makrūh (abominable) unless this is the only way of having presence of the heart (full concentration).
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.
The time of the morning nāfilah starts before the Fajr prayer , f r o m the Fajr adhan until the appearance of redness in the east, and it is possible to perform that immediately after the night prayer.
It is not necessary but it is better to correct their mistake.
The Paternal homeland of a person is not considered as the homeland of that person unless he/she stays there continuously for a long time like one year.
Your prayers and fasting should be performed complete in both places.