Write the process. Use Boolean Identities to simplify if needed.

$1.$ Suppose we have inputs x $=1,$ y $=1,$ compute the output of NOT$($x AND y$)$

$2.$ Suppose the inputs are x$=1,$ y$=1,$ compute the output of NOT$($x$)$ OR NOT$($y$)?$

$3.$ Use NAND gates to express OR gate.