QUESTION 1) a) Suppose, you have bought a smart watch for checking the temperature and oxygen level of your body whenever necessary. Explain the sensors and working mechanism of those sensors which can serve the above purposes. [3 Marks] b) In this smartwatch, there is a sensor which is used to track our movement and speed. There is another sensor which can measure our rotation, gravity, and angular velocity. Identify and explain those sensors. [4 Marks] QUESTION 2) Suppose, John and Jack are both preparing their interfacing project for their course. John's project contains one microprocessor (master) and three development boards (slave). Jack's project contains three microprocessor (master) and three development boards (slave). a) Which communication protocol are they using? [1 mark] b) Write the process of the communication protocol Jack is using. (4 marks] c) Write 4 advantages and disadvantages of the communication protocol John is using. [2 marks] QUESTION 3) Suppose, you are using a certain type of memory for your device which generates heat and noise when you use your device. a) Why do you think the heat and noise is being generated? (1.5 Marks] b) Explain the procedure that takes place when updating an existing data in the memory in your own words. [2.5 Marks] c) Suppose one day you find a major portion of data that was stored in the memory is lost. What might be the probable causes of losing the data? Write in your own words. [2 Marks] d) What do we mean by the 'Allocation Unit' of the memory? [1 Mark]