Answer it
P1 a1 greenhouse logic
4 marksYou mark it yourself against the marking points
A school greenhouse has three sensors, each giving 1 or 0.
- A is 1 when the temperature is too high.
- B is 1 when the roof window is closed.
- C is 1 when the soil is moist.
A warning light X turns on when the temperature is too high and the window is closed, or when the soil is not moist.
(a) Write a Boolean expression for X. [1]
(b) Construct the truth table for X, with columns A, B, C and X. [3]
[4]