What is the ruling on loudly sending prayers on the Prophet (PBUH ) after the call for prayer Athaan?
                                All perfect praise be to Allah, The Lord of The Worlds                                                                                                                                                            Sending prayers on the Prophet after Athaan is a Sunnah for the Mou`zen (caller for prayer ) and the hearer. However, there is no harm in doing it loudly after the end of Athaan, but sometimes, it shouldn`t so that people wouldn`t think that it is an integral part of the Athaan. And Allah Knows Best.
                             
                        
                            
                                
                                Is the Aqeeqa due on the newborn in case of dying almost a month after the delivery?
                                Offering Aqeeqa after a week of a newborn death is recommended.
                             
                        
                            
                                
                                Is Iddah (waiting period) incumbent on an old woman whose husband had died?
                                Upon the death of the husband, Iddah is incumbent on the wife regardless of their age. And Allah Knows Best.
                             
                        
                            
                                
                                A sixteen-year-old young woman suffers from Alopecia, and lost her hair and eyebrows as a result. Is it allowed to draw her eyebrows using henna and an eyeliner? 
                                All perfect praise be to Allah, the Lord of the worlds. I testify that there is none worthy of worship except Allah and that Muhammad, sallallahu ‘alayhi wa sallam, is His slave and Messenger.
It is permissible for women to use henna and what the asker has mentioned isn`t considered hair extension. However, if this young woman is proposed to, she must disclose this matter to the person proposing to her to avoid deception. And Allah The Almighty Knows Best.