An incrementer is a special kind of adder that takes in one input and adds 1 to it. (That is, it computes S = X + 1). Show how you can build a 4-bit incrementer using only half adders. (Remember, a half adder has two inputs and two outputs—it does not have a carry-in input.)

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]