Statement: Read the program given below and state the contents of all registers after the execution of each instruction in sequence.
Main program:
4000H     LXI SP, 27FFH
4003H     LXI H, 2000H
4006H     LXI B, 1020H
4009H     CALL SUB
400CH     HLT
Subroutine program:
4100H     SUB: PUSH B
4101H     PUSH H
4102H     LXI B, 4080H
4105H     LXI H, 4090H
4108H     SHLD 2200H
4109H     DAD B
410CH     POP H
410DH     POP B
410EH     RET