Calculate the user's age from the year they were born!
- Create a new variable called year.
- Get the value of the year input, and store it in the year variable.
- Create a new variable called age.
- Calculate the user's age by subtracting the year from 2017. Store the result in the age variable
- Append the user's age to the message div!
Add a name input. Update the message to say "NAME is X years old.", where NAME and X are the age and name variables.