Taking the baseline monetary OLG model literally, what features of the model economy enables fiat money to satisfy the three roles of "money"?

For all questions assume the following starting point: The money supply (M) is composed of currency (C) held by the non-bank private sector (NBPS) and demand deposits (DD) held at banks. Banks are required to hold cash reserves (CR) equal to 10% of their demand deposit liabilities. The remainder of the bank’s DD liabilities is backed by loans (L). Initially, banks have 2000 in cash reserves and the NBPS holds 500 in currency. Currently, banks not hold excess reserves.   a. What are the initial values for DD, L, and M?   DD= $20,000 L= $18,000 M= $5,000   b. What happens to the values in part a, if the NBPS decides to hold an additional 200 in currency?   DD = 20,000, L = 18,000, M = 20,700   c. What would happen to the values in part a if banks decided to hold 2.5% excess reserves?   DD = 20,000, L = 17,500, M = 20,500   d. What happens to the values in part a if concerns about the economy's future caused both b and c to happen? DD = 20,000, L = 17,500, M = 20,700 Given the results in…

If real output in an economy is 1,500 goods per year , the money supply is $ 350 , and each dollar is spent an average of 3 times per year then 5 points

What are the main differences between Fisher’s and Friedman’s theory of the demand for money?