Jamaat Salaah and Imaamat

Not going to the Musjid due to fear of being hijacked

Q: My mother does not want me to go to the Masjid for Maghrib and Esha Salaah. Though we only live 15-20 minutes from the nearest Masjid, our house is in a somewhat isolated area. So my mother fears me being hijacked or something similar. Hijackings etc. are common at these times and in our area, so the fear of my mother is valid. However, I do not feel it is so dire. But I could be wrong. Though I also want to perform all my Salaah in the Masjid Insha-Allah. Please advise if I have to follow this command of my mother and thus perform Maghrib and Isha Salaah at home?

Two people performing jamaat

Q: If the time for Fajr salaah in the masjid /musallah is up, and there is only the muazzin and imam present, but someone arrives just then but still needs to make wudhu and read sunnats. Should the muazzin stand behind the imam because they know there is another musallee that will join the salaah later, or should he stand on the right of the imam and when the musallee comes to join then move back to the saff?

Looking at the next Musallee to determine how many rakaats one missed

Q: A person arrives late to the masjid and misses a number of rakats with the imam. When the imam says salam, he thus has a number of extra rakaat to make up. But he doesn't remember how many. In order to find out, may he pray slowly and see how many extra rakaats the people around him do, since they joined the prayer at the same time as him?