Given that the number 7713a8 is divisible by 4, where a is a digit, what are the values of a?

Given that the number $7713 a 8$ is divisible by 4, where $a$ is a digit, what are the values of $a$ ?

Mixed-up sentence exercise

Put the parts in order to form a sentence. When you think your answer is correct, click on "Check" to check your answer. If you get stuck, click on "Hint" to find out the next correct part.