Question of management

The management accountant at ABC Carpets Co has prepared manufacturing cost schedules for each of the 20 types of carpet in the company’s product range.

1) Calculating gross profit at different unit sales prices
2) Comparing manufacturing cost with buy-in cost
3) Determining which carpets to remove from the range
4) Issuing credit limits to customers

I am confused that the 4 should take into account or not
Please give a advice

Which of the following are responsibilities of the internal audit function?

1) Testing the accuracy of financial and operating data
2) Assessing the startegic risks facing the company
3) Ensuring the company’s policies and procedures are being followed
4) Preparing the year end account

Is the 4 for duty of internal audit function or not
Please give a advice