The spreadsheet figure provides information about the demand for money and supply of it in Minland. Column A is the interest rate, $R$. Columns $B$, $C$, and $D$ show the quantity of money demanded at three different levels of real GDP: $Y_{0}$ is $£ 10$ billion, $Y_{1}$ is $£ 20$ billion, and $Y_{2}$ is $£ 30$ billion. Column $E$ shows the supply of money. Initially, real GDP is $£ 20$ billion.
Draw a graph to show the demand for money, supply of money and money market equilibrium in Minland and explain what happens in Minland if the interest rate:
a Exceeds 4 per cent a year?
b Is less than 4 per cent a year?
c Equals 4 per cent a year?