To solve this problem, we need to fill the boxes with digits such that each number formed is divisible by 4. The divisibility rule for 4 states that the number formed by the last two digits must be divisible by 4.

Here’s the analysis for each case:

1. 28_
   The last two digits should form a number divisible by 4. The options are:
   • 28 (already divisible by 4)
   • Any additional digit can go in the blank since the is in quantitives