from a qualification oriented expression to an enumeration oriented expression in the format of $\{$U$0|1$TQ $=1,0$ e R$$\}.(4$ pts$)$ II$\mathrm{.}1\mathrm{.}2.$ Convert set $\{$x$|$Ax $=0,$ x E R$\}$ from a qualification oriented expression to an enumeration oriented expression in the format of $\{$Px$|2$ R$\}.$