What would happen is that the fed would have to increase the money supply by 3 billion
What would cause the supply to be increased
When the interest rate stands at 2%, the demand for money increases to $7 Billion, surpassing the available money supply of $4 Billion according to the graph.
Consequently, the Federal Reserve (Fed) will augment the money supply by $3 Billion to restore equilibrium.
By doing so, the Fed aims to align the money supply more closely with the heightened demand for money, effectively meeting the economy's needs and restoring balance in the money market.