Complete this expression. Assume that any variables are not equal to zero.
z0\displaystyle {z}^{{0}}=  

Simplify the following expression completely.
(5v+3)0\displaystyle {\left({5}{v}+{3}\right)}^{{0}} =  

Simplify the following.
20\displaystyle {2}^{{0}} =  

Simplify the following expression completely.
5v0\displaystyle {5}{v}^{{0}} =