Write an Arduino program to read the state of PK2, output this state on PD0, and output the complement of this state on PE3. Write the program to minimize the time delay between a change on PK2 reflecting onto PD0 and PE3. Attach a button to PK2, and an LED (with a series resistor) to PD0.

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the answer to your question would be something called hertz. the unit of measurement called a hertz, which is one cycle per second, is used to measure clock speed. within one cycle, your computer processes, refreshes, or updates itself to the changes that it is going through. in the case of computer clock speed, one hertz equals one tick per second. the clock speed of computers is usually measured in megahertz (mhz) or gigahertz (ghz)