A logic function needs to be implemented such that $4$ inputs are examined and the result is a $0$ if one or two of the inputs is a $1,$ otherwise the result is $1.$

$1)$ Construct a truth table for the the logic function represented by this specification.

$2)$ Implement a two$-$level logic circuit that implements the logic function.

$3)$ minimize or attempt to minimize the logic function and re$-$draw the circuit for $2)$ if it has changed.