void setup() {
  // put your setup code here, to run once:
 Serial.begin(9600);

float test1;
test1 = 90;

float test2;
test2 = 88;

float test3;
test3 = 91;

float average;
average = (test1+test2+test3) / 3;

Serial.println("Test 1");
Serial.println(test1);

Serial.println("Test 2");
Serial.println(test2);

Serial.println("Test 3");
Serial.println(test3);

Serial.println("Average");
Serial.println(average);

}

void loop() {
  // put your main code here, to run repeatedly:

}