Bleed for a large print- advert

[Curly creations]

Hi! I'm doing a large advert. 10 foot by 2 and a half foot. What is the average bleed for this? It's in Photoshop.

Also what dpi is average for this. I put 150 is this correct?

finally how do I avoid it being pixalated. Any tips?

[Norman Sanders]

A year or more ago, the brillint @davescm presented the formula and  supporting data for calculating recommended ppi based on viewing distance. It is a treasure. Here is a copy. Regarding bleed, check with the firm doing the printing.

[Curly creations]

Thankyou Norman!