If statement including several variables to be true

i have uploaded a schematic af the switches, there you can see that switch for 7KR is not connected on the NO pin. but the 30V that goes trough all the switches ends op as an input on the Arduino, the problem is all the switches is making this input go LOW, si i was thinking that the statement needs to be when 7kr inputs get LOW and none of the other switches is high, then the statement needs to be true.