With the development of China's economy, residents' savings deposits have increased year by year. The table below shows the year-end balance of urban and rural residents' RMB savings deposits in a certain region:

\begin{center}
\begin{tabular}{ | l | l | l | l | l | l | }
\hline
Year & 2010 & 2011 & 2012 & 2013 & 2014 \\
\hline
Time code $t$ & 1 & 2 & 3 & 4 & 5 \\
\hline
\begin{tabular}{ l }
Savings deposits $y$ \\
(hundred billion yuan) \\
\end{tabular} & 5 & 6 & 7 & 8 & 10 \\
\hline
\end{tabular}
\end{center}

(I) Find the regression equation $\hat { y } = \hat { b } t + \hat { a }$ for $y$ with respect to $t$.

(II) Use the regression equation to predict the RMB savings deposits in this region for 2015 ($t = 6$). Note: In the regression equation $\hat { y } = \hat { b } t + \hat { a }$,

$$\hat { b } = \frac { \sum _ { i = 1 } ^ { n } t _ { i } y _ { i } - n \overline { t } \overline { y } } { \sum _ { i = 1 } ^ { n } t _ { i } ^ { 2 } - n \bar { t } ^ { 2 } } , \hat { \mathrm { a } } = \overline { \mathrm { y } } - \hat { \mathrm { b } } \overline { \mathrm { t } }$$