My answers for these subsets are wrong please help and fix

Assume the following register contents:

x$5=0$x$00000000$ AAAAAAAA

x$6=0$x$1234567812345678$

$2.$ And x$7,$ x$7,$ x$5$

X$7=0$x$01234567801234567$

X$5=0$x$00000000$AAAAAAAA

After the AND operation, x$7$ becomes $0$x$0123456781234567$ & $0$x$00000000$AAAAAAAA

$=0$x$0000000081234567$

So the final value of x$7$ after the instructions are impletention are $0$x$0000000081234567.$

c$.$ For the register values shown above, what are the values of x$7$ in binary and hexadecimal

representations, respectively, for the following sequence of instructions?

slli x$7,$ x$5,3$ # show intermediate value of x$7$

xori x$7,$ x$7,0$x$0$FEF

$1.$ slli x$7,$ x$5,3$

x$5=0$xAAAAAAAA

After the shift, x$7$ becomes: $0$xAAAAAAAA $<<3=0$x$55555555$

$2.$ andi x$7,$ x$7,0$xFEF

x$7=0$x$15555555$

$0$xFEF $=0$x$0000000000000$FEF

After the AND operation, x$7$ becomes:

$0$x$15555555$ & $0$x$0000000000000$FEF $=0$x$0000000000000555$

So$,$ the final value of x$7$ after these instructions is $0$x$0000000000000555.$