$P^{K{a}_1},P^{K{a}_2},P^{K{a}_3}$  of Glutamic acid are 2.0,4.0 and 9.5 respectively . The correct statement(s) regarding glutamic acid is/are

Glutamic acid gives yellow precipitate when treated with concentrated  $HN{O}_3$

At a $P^H$ of 12, Glutamic acid predominantly exist as 
 

At a $P^H$ below 2.0, the aminoacid exists predominantly as
 

Solubility of Glutamic acid is maximum at a $P^H$ of 3