Alzheimer’s disease will be a cause of expiation for the sufferer, if Allah wills, and he will have the reward for going through calamity. In addition to that, he will have the reward of righteous deeds that he regularly used to do before he was stricken with this disease.

Giving lessons after prayers is something that is permissible, and it comes under the heading of means that are permissible in principle. This is proven on the basis of the Sunnah and the practice on a large scale that has been ongoing since the best of generations. There is nothing wrong with giving a lesson before Jumu`ah so long as it does not distract the worshippers or take up too much space, especially if there is a need for that.

It is permissible to pay fees for permissible services that all the people [in the building] pay for, even if some of them use them for unlawful purposes.