Reading four rakaats nafl salaah after the fardh of Esha

Q: I heard that 4 rakaats after Esha is equal to Tahajjud Salaah on Laylatul-Qadr. I wanted to know what's the tarteeb of reading these 4 Rakaats, is it 2 Sunnah and 2 Nafl before Witr or is it 2 Sunnah then 2 Nafl and another 2 nafl then Witr or is it 2 Sunnah and 4 Nafl with one Salaam and then Witr? 

Also, what will be the count of the Esha Rakaats taking into consideration either 4 or 2 Rakaats before, these 4 mentioned in the Hadith and also the 2 Rakaats sitting after Witr?

Buying a bag of goods without knowing its contents

Q: There is a app called Refreshi, this is how it works, you pay a certain amount and get a bag of food/dessert etc... but you don't know exactly what. This is how it is written. 

"Enjoy a tasty mix of baked goods. R68 You could receive, donuts, croissants, danishes, and/or pastries. Every bag is a surprise and delight to your tastebuds." 

Is this permissible?

Doing Hajj-e-Badal for a person who has dementia

Q: Hajj was fard on a person, but he delayed it until he became old and lost his senses due to severe dementia. Is it valid for his family to fulfill the fard for him by: 

1. Bringing him along for Hajj and making the intention of ihram etc for him 
2. Doing hajj e-badal for him during his lifetime (note that he is not in his senses to command this, but it will be fully on their own initiative) 
3. Doing hajj e-badal for him during after his death 

Please provide the ruling for each of the three scenarios. 

Husband seeing to the medical expenses of his wife

Q: What we know as Muslims that according to shariah man is responsible for the economic needs of his wife, but I have heard that economic responsibilities as per shariah do not include wife’s medical expenses. 

If such is the case, when in an Islamic family setup a woman is responsible to manage the house and look after her children she will have no time to earn her own income. Knowing about these circumstances when woman has no independent income because she has no employment as she was looking after the house which she is expected to do as a Muslim woman then why isn’t her husband obligated to finance her medical needs?

Is being born on a certain day a sign of bad luck?

Q: As per Hadith no. 7054 narrated in Sahih Muslim "Allah, the Exalted and Glorious, created the clay on Saturday and He created the mountains on Sunday and He created the trees on Monday and He created the things entailing labor (or hardship/displeasure) on Tuesday and He created light on Wednesday and He caused the animals to spread on Thursday and He created Adam (peace be upon him) after 'Asr on Friday..." (Sahih Muslim)." 

As per this Hadith, on Tuesday things which are hated upon/unliked are created. So I want to ask, if one is born on Monday or Friday, are they considered to be lucky/blessed? Similarly, if a person who is born on Tuesday, is that person unlucky/unblessed or unliked in the sight of Allah who has to go through a hard life?