Consider a relation R$=\{$p$,$q$,$r$,$s$,$t$,$u$,$v$,$w$,$x$,$y$\}$and the set of the following dependencies

FD$1$:$\{$p$,$q$\}->\{$r$\}$

FD$2$:p $->\{$s$,$t$\}$

FD$3$:q $->\{$u$,$v$,$w$\}$

FD$4$:s $->\{$x$,$y$\}$

The candidate key is $\{$p$,$q$\}$ In which Normal form is this table? Explain why?