2 points: Write a javascript statement to prompt a user for a zipcode. Assign the result to the variable zip_code and use a default value of 37996.
zip_code = prompt("please enter a zip code", 37996)
1 point: What value gets returned by parseInt if a string cannot be converted to an integer? NaN
2 points: Suppose you have the zipcode stored in the zip_code variable and you want to create a dialog box with the message:
```
     zipcode: value
     
```
where value is the value of zipcode. Write the Javascript statement to accomplish this task.
alert("zipcode: " + zip_code);