Taking advance rent before renting out an apartment

Q: I am going to rent my apartment. Someone handling the property told me that the tenant will give 2 months advance rent and security deposit.

1. Is it permissible to take the rent of one or two months in advance?

2. Is it permissible to take a security deposit?

3. Is it permissible to rent my apartment through this man or I should do the deal myself?

4. I have never seen the apartment, possession is not yet given to me, but I have paid the full amount during construction. Is all this fine?

Inheritance

Q: My sister lost her husband and she has two kids viz 7 ear old son and 11 year daughter. The husband left behind his business and two buildings; one residential and one commercial where the business is running. However, these two buildings have been orally given to him by his father. There is no written proof of transfer. The father of the deceased is alive and has huge property. He has another son who has some psychological problem hence unable to make any decision.

We have temporarily transferred the business in the name of the children under the guardianship of the mother so that no one can cause any harm to the business.

My question is how will the law of inheritance apply in this case?

Selling one's share in the stock market

Q: I am an active stock investor, My question is that I invested in a company which was halal almost 2 years ago but as of now, it's interest bearing debt is 71.2% and before it was halal because it's interest bearing debt was less than 30% of it's market capital. I use a stock screener which showed it was halal.

So, what should I do in this case as it was halal at the time of investing; Should I sell it with profit because it was halal at that time? Should I sell it with no profit? or keep the stock in my portfolio until it becomes halal again?