Assume that Registers X$0$ and X$1$ hold the values $08000000000000000$ and $0$xD$000000000000000,$ respectively. Note: Hexadecimal values are shown, not decimal.

What is the value of $x_4$ for the following assembly code?

ADD $x4,x0,x1$

$2.$ Is the result in $x4$ the correct result, or has there been overflow?

$3.$ If overflow, output $999$ to Register X$12.$

$4.$ For the contents of Registers $xO$ and $x1$ as specified above, what is the value of $x5$ for the following assembly code?

SUB $x5,x0,x1$

$5.$ Is the result in $x5$ the correct result, or has there been overflow?

$6.$ If overflow, output $888$ to Register $13.$

$7.$ For the contents of Registers $x0$ and $x1$ as specified above, what is the value of $x6$ for the following assembly code?

ADD $x6,x0,x1$

ADD $x6,x6,x0$

$8.$ Is the result in $x6$ the correct result, or has there been overflow?

$9.$ If overflow, output $777$ to Register $14.$