What will be the values of the specified register$($s$)$ and flags after the execution of the following instructions?

SUB AX$,$ AX

SUB AX$,1$

PUSH AX

a$.Ax=FFFFH$

$CF=0,PF=0,AF=1,SF=1,ZF=1$

b$.Ax=FFFFH$

$CF=1,PF=1,AF=1,SF=1,ZF=0$

c$.$ None of these

d$.Ax=FFFFH$

$CF=1,PF=1,AF=0,SF=1,ZF=1$

e$.Ax=FFFFH$

$CF=0,PF=1,AF=1,SF=1,ZF=1$