You are saying that and

Those are the values given in your table (nicely done, by the way) for (0, 0). But you are asked to find the values at u= 0, v= 0. Because and , when u= v= 0, and . you need to use the (1, 2) row to find and .

But the answer in BOB is 7, 2... Where is my error in understanding?