The table below shows hypothetical values, in billions of dollars.
a. Use the table to calculate the M1 and M2 money supply for each year, as well as the growth rates of the M1 and M2 money supply from the previous year
b. Why are the growth rates of $\mathrm{M} 1$ and $\mathrm{M} 2$ so different? Explain.
$$\begin{array}{llccc}
& & \mathbf{2 0 0 9} & \mathbf{2 0 1 0} & \mathbf{2 0 1 1} & \mathbf{2 0 1 2} \\
\hline \text { A. } & \text { Currency } & 900 & 920 & 925 & 931 \\
\text { B. } & \text { Money market mutual fund shares } & 680 & 681 & 679 & 688 \\
\text { C. } & \text { Saving account deposits } & 5,500 & 5,780 & 5,968 & 6,105 \\
\text { D. } & \text { Money market deposit accounts } & 1,214 & 1,245 & 1,274 & 1,329 \\
\text { E. } & \text { Demand and checkable deposits } & 1,000 & 972 & 980 & 993 \\
\text { F. } & \text { Small denomination time deposits } & 830 & 861 & 1,123 & 1,566 \\
\text { G. } & \text { Traveler's checks } & 4 & 4 & 3 & 2 \\
\text { H. } & \text { 3-month treasury bills } & 1,986 & 2,374 & 2,436 & 2,502
\end{array}$$