QUESTION 15 If a problem involving binary variables has 4 inputs, how many rows would the corresponding truth table have? Do not consider the first row of the table (headers). QUESTION 16 The Internet of Things presents challenges related to security and privacy. True False QUESTION 17 A typical microcontroller contains all the memory and interfaces needed for a simple application. True O False QUESTION 18 Dynamic microphones are relatively cheap and very good to detect low-power sounds. O True False QUESTION 19 Pneumatic actuators have very small response times O True False