Which of the following are valid Java Identifiers? Choose all that apply.

a$)$ My Variable

b$)2\_$Tax

c$)\_$hi$\_$world$\_$

d$)!$age

e$)$ size!

f$)$ vairabel

g$)$ max$\_$of$\_$array

h$)$ x & y

i$)$ Code$123$

j$)$ SpEcIaL$\_$vAlUe$\_1$