Essentially, the rule goes as so: odd + odd = even, even + even = even.
Although that may not be the answer you're looking for, it is a math rule that is never debunked and essentially the premises for why you get an even sum practically always depending on the numbers.
Hope this helps!
I don't think anyone can solve this without seeing the table mentioned in the question :)
Answer:−28−98i
Step-by-step explanation: