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You’ve done a great job completing this program.

We’ve created quite a few meaningful functions. Namely, we’ve created helper functions to print a list of grades, compute the sum, average, variance, and standard deviation about a set of grades.

Let’s wrap up by printing out all of the statistics.

Who needs to pay for grade calculation software when you can write your own? :)

### Instructions

**1.**

Print out the following:

- all of the grades
- sum of grades
- average grade
- variance
- standard deviation

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