Hajj-e-badal

Q: I want to perform Hajj for the second time. Can I perform this Hajj as Hajj-e-badal for my father as he is not well since he has hypertensive, sugar and prostate problems. I have problem with a mahram. My 15 year old nephew will turn 16 soon. Can he go with me as a mahram?

Plucking white hairs

Q: Recently in one of your replies, the following Arabic extract was quoted. ولا بأس بنتف الشيب

I was taught that it is not good to pluck out white hair which seems to contradict this extract. Please explain to me the ruling on plucking out white hair.

Carrying out a sunnah action without making the intention

Q: An act that's sunnah. When one started it, it was done with the niyyah of sunnah. After years you become accustomed to it, it becomes a habit like dusting the bed or reading certain duaas or eating with the right hand, etc. Will you still get the thawaab of practicing a sunnnah or will the niyyah be have to made every time you do an action? Some aalima said that one won't get rewarded without the intention.