Faraaidh of wudhu

Q: Is wudu complete without washing feet?

Q: Before becoming a Muslim I made some tattoos on my body. Will my wudhu be valid with the tattoos and is it necessary for me to try to remove it? Removing tattoos can be very painful and laser treatment is very expensive.

Q: I use vaseline on my skin when it gets dry. Will my wudhu be valid if I perform wudhu without removing the vaseline?

Q: Does my hair turning greasy naturally after not washing it for like 3 days form a barrier so my masah for wudu isn’t valid?

Q: After salaah I saw a little dough stuck on my nail. Was my wudhu valid? Do I have to repeat my salaah?

Q: I have been using a hair patch on my head since 2016. I just want to ask whether I can do wudhu or ghusal with a completely fixed hair patch? As it's practically impossible to perform wudhu in a public place with lifting the hair patch.

Q: If one has a deep cut and it's plastered or bandaged, and one cannot remove it for wudhu out of fear that the wound will continue bleeding or further be harmed, is it correct to make masah over the bandage?

If the bandage has blood, can the person perfrom salaah with it?

Q: A person made wudhu and performed salaah. Later on, he noticed that there was some dirt stuck under his nail which did not get washed away. Is his wudhu and his salaah valid?

Q: When making wudhu, is it fardh to make masah of any quarter of the head or does it particularly have to be the front of the head?

The reason for enquiring is that if it's fardh to make masah of any quarter, then a woman in pardah will be able to make masah of her head without removing her scarf while traveling.

Q: If a person does not perform a complete wudhu, will his wudhu be valid? If a person performs salaah with such a wudhu, what will be the condition of the salaah?