9. Explain the functionality of the circuit in Fig Bt using truth table. Write a Boolean expression for X. des 30 ou Fig. B4 mark 10. Fig BS is logic circuit for a warning system for a greenhouse. Once the gardener or caretaker has switched the system on, he wants to be wamed by the following conditions: I if the greenhouse gets too cold or [hmarks II if someone has opened the door. Semarks) NOT teglves output of 1f door open Magnetic switch on door OR ate gives output of 18 door open or greenhouse cold Opero NOT D B 1 OR E Temperature Sensor AND guteglves output of: system is switched on and output of Orate is 1 Cold F NOT gate sotul #greenhouse cold G Os c Main system switch Warning light AND Fig B5 Use the figure to answer the flowing questions: Verify using truth table the conditions that may trieger a warning light Develop a Boolean expression for the system in fige 85 marks [6marks)