Suburbs being joined to the city

Q: I have travelled the musaafir distance to a major city with many suburbs within it, and I will be residing in this city for two months. However, from time to time, I will move between the suburbs of this city and spend the night in the different suburbs of this city. Up to now, I do not have the intention to stay 15 days in one particular suburb. Am I a musaafir or a muqeem?

Were the previous ummats commanded to invite towards good and forbid from evil?

Q: Kindly clarify whether it is correct to say that in the previous ummats, only the Nabi was allowed to give dawat. As proof, it is said that Hazrat Haroon (Alayhis Salaam) was made a Nabi in order to accompany Nabi Musa (Alayhis Salaam). But is it not the case that the person mentioned in Surah Yaseen also gave dawat to people by asking them to follow the Nabi? Also, people in previous ummats had to act to prevent people from wrongdoing (preventing evil is also considered part of dawat). Does this not show that ummatis of the previous ummats also had to engage in some form of dawat?

Ordering Islamic books online

Q: Is it permissible to order Islamic books online and have them delivered through shipping, even though the books contain aayaat (and some are tafseers and translations) and one knows that the shipping process is quite rough? Realistically, the packages will be thrown around, placed on the ground, will have other goods placed upon it, might even get stepped on, etc. before it gets to the destination. Am I allowed to order?

Giving zakaat to one's brother who is jobless

Q: My youger brother who is jobless and they have newborn baby. Currently, he has no income. Can we give him bulk of zakaat so he can fulfill the needs of his wife and baby? Few months ago we gave him zakaat for the amount equivalent to US$1000 which he deposited in his bank account. Can we give me more money from zakaat so he can manage the needs of his wife and baby?