Complete the following program that only adds integers that are even negatives. The program considers the NON$-$ZERO integers at labels N$1,$ N$2,$ and N$3$ and stores the sum of the appropriate integers in the memory at label SUM. It uses a subroutine at label CHKN to check each integer. $.$ORIG $\backslash$times $3000$ LD RO$,$ N$1$ L$1$ ADD R $1,$ R $0,$ #$0$ LD R O$,$ N $2$ LEA R$6,$ CHKN L$2$ JMP R$6$ ADD R$1,$ R$1,$ R LD RO$,$ N$3$ L$3$ ADD R$1,$ R$1,$ R ST R$1,$ SUM HALT CHKN ADD R$4,$ RO$,$ #$0$ ; move in to R$4$ for testing AND R$4,$ R$4,$ x$0001$ ; right most bit is always $1$ if odd WRONG AND R $0,$ R $0,$ # $0$; zero out wrong values RETURN RET N$1.$FILL; value not shown N$2.$FILL ; value not shown N$3.$FILL; value not shown SUM $.$FILL #$0.$ END