A 16 MHz UNO is used to count the number of PEPSI cans on a moving conveyor belt, with a belt speed close to 10 ft/sec. The cans are placed one after another with some non-constant spacing between neighboring cans. Suppose one optical sensor, connected to digital pin 3, is used for the measurement. When the sensor detects a can, a 5V pulse shows up on pin 3. Otherwise, a zero volt is present on pin 3. Print out to the IDE serial monitor once every ten seconds the number of cans counted in that ten seconds. Write a sketch, with suitable comments