Functions supplyy of money (macroeconomics)

a) functions:
measure of value
measure of exchange
store of value

b) discuss the evolution over forms of money.
-why did we go from trading with stones, salt to gold and bank deposits include:
durability, profitability, divisibility and value compression

c)cash base diagram:
-cash with public and cash with bank
-discuss the main component of the money supplier, modern form of exchange.

d) conclusion:
problems in measuring the supply of money.