Sayyiduna Uthman (Radiallahu 'Anhu) reciting the whole Quraan Shareef in Tahajjud Salaah

Q: I have learnt that Sayyiduna Uthman (Radiallahu 'Anhu) used to recite the whole Quraan Shareef in Tahajjud Salaah. If one takes 5 minutes to properly recite a 1/4 para and hence 20 minutes per para then it takes 600 minutes (10 hours) to recite the whole Quraan Shareef. Since the night is not always 10 hours long, does it mean that Sayyiduna Uthman (Radiallahu 'Anhu) recited a para in less than 20 minutes?

Using emojis

Q: Is it khilaaf-e-sunnah to use emojis that have laughing faces while chatting on WhatsApp? As our Prophet (sallallahu alaihi wasallam) didn't laugh showing his mubarak teeth.

Reward for performing salaah by applying itr, wearing a turban or after performing miswaak

Q:

1. Is there any hadith that states that the reward for praying salah applying itr (fragrance) is 70 times more than offering salah without applying itr?

2. The same reward I have heard for offering salah wearing an عمامة (turban) for men, is it stated in any hadith?

3. Is the above mentioned reward given for a person praying salah after doing Miswaak as well?

Looking after the wealth of an autistic person

Q:

1. If an autistic baaligh child does not know the value of wealth, will her wealth be like the wealth of a non-baligh orphan? Meaning that her wealth would be given to her guardians to use only in the interests of the child.

2. I have an autistic relative. I have some of her wealth in my possession for safe-keeping as I fear that if I give it to her parents, they may misuse it. Meaning that they may use it for their other children also (not only in the interests of the autistic child). What should I do with that wealth?

3. If I have that wealth in my possession for safe-keeping, and someone (non-baligh) uses it without my knowledge, would I have to pay back any amount to the autistic child?