The following is an excerpt from the blink example: void loop() { digitalWrite(LED_BUILTIN, HIGH); delay(1000); digitalWrite(LED_BUILTIN, LOW); delay(1000); } a) Create a variable called time that will store the time intervals needed for the delay function. Rewrite the code above so that the variable is substituted for the value 1000. b) Create a second variable valued time2. Using time and time2, modify the code so that the LED stays on for 3 seconds, and off for 1.5 seconds