For computer class:

Assume that registers $x0$ and $x1$ contain the values $05000000000000000$ and

$0A000000000000000,$ espectively. What is the value in $x9$ after the execution of

SUB X$9,$X$0,$X$1?$

$0$xB$000000000000000$

$0$xF$000000000000000$

$0$x$0000000000000000$

$05000000000000000$