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b) A vending machine has 12 slots of food items of sale as show in Figure 1. Only 8 slots are filled with items and 4 slots are out of stock. The slot with food items is slot number 0,2,4,6,8,9,10,11. The machine has 4 inputs A, B, C, D where A is the MSB. The output LED will only light up (HIGH) when the slots with available food items are selected. Draw the system truth table (4 marks) E Determine the simplified Boolean Expression using K-Map (8 marks) Draw the simplified logic circuit