Grade for Class 6 Assignment

Good job, Mike.

#### Exercise 1

- No crashes, works as expected. 4 points
- Study to changes provided :book: 

#### Exercise 2

- No crashes, works as expected. 4 points
- Study to changes provided :book: 

#### Exercise 3

- No crashes, but doesn't work as expected. 3 points

This output:

```
$ ruby 3_birthday_helper_read.rb jane
Unknown birth date for 'Jane'
Unknown birth date for 'Jane'
Jane will be 56 on 2014-3-27
```

Should be:

```
$ ruby 3_birthday_helper_read.rb jane
Jane will be 56 on 2015-03-27
```

- Use the `[]` method to access a value, given a key, in a Hash object. Iteration is unnecessary and inefficient.

For example:

```ruby
some_hash = { "one" => 1, "two" => 2 }
some_hash["one"]  #=> 1
```

- Study to changes provided :book: 

#### Exercise 4

- No crashes, works as expected. 4 points
- Study to changes provided :book: 

#### Exercise 5

- No crashes, works as expected. 4 points
- Study to changes provided :book: 

#### Total

`4 + 4 + 3 + 4 + 4 = 19` :star: