Please answer the Exercise 2.5.18, 2.5.19 and 2.5.20 with your detailed explanations, it's much appreciated!

2.18 The Conceptual Framework for Financial Reporting provides a choice of measurement basis. Complete the following sentence. for an asset is the cost that was incurred when the asset was acquired or created and, for a liability, is the value of the consideration received when the liability was incurred. 2.19 Under an accounting concept, the commercial reality of transactions is reflected in the financial statements and this takes precedent over the legal form of arrangement. Complete the following sentence. The accounting concept described above is known as 2.20 Complete the following statement. Information can be compared: - For the same entity over different periods - Between different entities This describes the enhancing characteristic of