PLease help me! I’ve been stuck here for quite a while. Thanks a lot!

```
// Senick is trying to find the elusive Burleous Majoris!
// "But he doesn't know how big a Burleous Majoris would be..."
// Find the average size of this burl population to use as a baseline!
// This function returns average size of all the burls in an array.
function averageSize(burls) {
var sum = sumSize(burls);
// Remember the average is the sum of the parts divided by the amount!
return sum / burls.length;
}
// This function should return the sum of all the burls sizes.
function sumSize(burls) {
// Implement the sum function using the burls 'size':
var cumulator = 0;
for (var i = 0; i < burls.length; i++) {
var burl = burls[i];
if (burl) {
var burlHealth = burl.health;
cumulator = cumulator + burlHealth;
}
}
return cumulator;
}
while(true) {
// Find the average size of the burls by calling the 'averageSize' function.
var animals = hero.findByType("burl");
var average = averageSize(animals);
// Say the average size of the seen burls!
hero.say(averageSize(animals));
}
```