Suppose you have an $8$ bit unsigned integer.

What binary mask could you use to extract only the rightmost $($sometimes called "least significant"$)4$ bits?

$-$What bit$-$wise logic operation$($s$)$ would you use with your mask to accomplish this task?

Suppose you have an $8$ bit unsigned integer.

What binary mask could you use to extract only the leftmost $($sometimes called "most significant"$)4$ bits?

What bit$-$wise logic operation$($s$)$ would you use with your mask to accomplish this task?

Suppose you have an $n$ bit binary value.

Describe the result of bitwise xor$-$ing $($i$.$e$.$ doing bit$-$wise exclusive or$)$ this $n$ bit value with another $n$ bit value comprised of all $1\text{'}$s$.$

Describe the result of bitwise xor$-$ing $($i$.$e$.$ doing bit$-$wise exclusive or$)$ this $n$ bit value with another $n$ bit value comprised of all $O\text{'}$s$.$