Those things which render the Salaah invalid

Seeing blood on one's clothing after Salaah

Q:

1. If one finds his garment stained with blood, would he need to repeat his salah performed while wearing that garment? (bleeding due to shaving unneeded hairs and ghusl performed after that). Would his wudu be broken due to bleeding and will the clothes be considered napak? The stain was less thn an inch in all dimensions.

2. If the salaah needs to be repeated, would only the Fard salah be repeated or sunan and nawafil as well?

Looking in the Quraan while performing salaah

Q:

1. Is it permissible to hold the Quran in one's hand in Salah for reading so that one can read unknown surahs after sure fateha.

2. Is it permissible to read the whole tarawih prayers (alone) and in other prayers.

3. If not, could you please tell me why we should not do it.

4. Why do people in the haram hold the Quran in their hand and read or read from the phone in their salah.