IAS 36 Impairment

Hi,

I went through the open tuition lecture on the impairment and it said that the impairment should be charged in the following way :

1) Specific assets
2) Goodwill
3) Pro-rata on the remaining assets

However, when I refer to Q2(c) March/June 2017 paper, the impairment is charged by :

1) Goodwill
2) Pro-rata on the remaining assets

Could you clarify the differences?

Thanks in advance.