Find and sketch the possible inputs x(t) that could produce y(t)

A digital circuit should produce a 1 to sound a warning if a seat belt is unfastened when the key is in the ignition and someone is sitting in the seat. The input SeatBelt is true if the seat belt is fastened. The input Key is true when the key is in the ignition. A sensor generates true for the signal Person when it detects weight on the seat indicating that someone is sitting in the seat. Write an equation for this function using the signals SeatBelt, Key, and Person   I keep struggling with this function from the truth table. I appreciate the help.

give 5 signal conditioning circuits/devices used for your assigned parameter.