$(25$ pts$)$ a$)$ After the following program is executed, what is the content of $R5$ in hex? b$)$ Which bank is selected? c$)$ What is the memory location $($in hex$)$ of data saved in R$5?$

ORG OOH

SETB PSW$.3$

CLR PSW$.4$

MOV A$,$ #O

MOV A$,$ #$55$H

MOV R$1,$#$5$

MOV R$2,$#$5.$

ADD A$,$ #$5$

DJNZ R$2,$ STEP$\_1$

CPL A

DJNZ R$1,$ STEP$\_2$

MOV R$5,$ A

END

a$)R5=$

b$)$ Bank

c$)$ RAM location$=$