Explain why each of the following items would not meet either the definition or the recognition criteria of an asset of the business:

(a). A letter from the owner of the business, addressed to the bank manager, promising to guarantee the bank overdraft of the business

(b). A list of the customers of the business

(c). An order received from a customer

(d). The benefit of employing a development engineer with a high level of ‘know-how’ specifically relevant to the business

(e). Money spent on an advertising campaign to boost sales

(f). Structural repairs to a building.