Hello,

I'm fairly new to python and I've currently run into a road block in this problem. I set up this code:

```
def average(the_list):
return the average of the list
def deltalist(the_list,a):
return a list which is each of the element of the_list subtracted by a
def squarelist(lst):
return a list which is each of the element of the_list squared
def variance(the_list,mean):
return squarelist(deltalist(the_list,mean))
def stddev(l):
a = average(l)
l3 = variance(l,a)
return math.sqrt(sum(l3)/(len(l3) - 1))
lst = [1,3,4,6,9,19]
print(stddev(lst))
```

the `return`

statements is the problem I've ran into. I want to implement the average, squarelist, and the delta list to find the standard deviation of the list that I've used in this code. How do I use the numbers that I have listed in `lst`

to get standard deviation?