$1.$ Suppose that DS $=1000$H$,$ SS $=2000$H$,$ BP $=1000$H$,$ BX$=0200$H$,$ SI$=0250$H and DI $=0100$H$.$ a$)$ Determine the addressing mode used in each of the following instructions :

i$)$ MOV AL$,[$BP$][$DI$]$ ii$)$ MOV CX$,[$DI$]$

iii$)$ MOV DX$,[$BX$]+100$H iv$)$ MOV DX$,[$BX$][$SI$]$

v$)$ MOV AX$,[$BP$+200$H$]$ vi$)$ MOV AL$,[$BX$+$SI$-200$H$]$

vii$)$ MOV AL$,[$SI$-100]$

b$)$ Determine the memory address accessed by each of the previous instructions