What are the integer values for $x$ and $y,$ respectively, for $A{l}_x(C{O}_3{)}_y?$

a$)1$ and $2$

b$)3$ and $2$

c$)1$ and $3$

d$)3$ and $1$

e$)2$ and $3$

The correct name for $N_2{O}_5$ is$.$