3. The equation below is used to compute the voltage at analog pin 3 on an Arduino Uno, storing the computed voltage as an integer in a variable named voltage_val. Find int voltage val nalogRead (3)/1023 5; a. voltage_val when the analogRead (3) function returns 621. voltage val-3V b. The value returned by analogRead (3) when the voltage at pin 3 is 4V. analogRead (3) 818 3. The equation below is used to compute the voltage at analog pin 3 on an Arduino Uno, storing the computed voltage as an integer in a variable named voltage_val. Find int voltage val nalogRead (3)/1023 5; a. voltage_val when the analogRead (3) function returns 621. voltage val-3V b. The value returned by analogRead (3) when the voltage at pin 3 is 4V. analogRead (3) 818