Consider a data consisting of 10 observations
\[
x_1, x_2, \dots, x_{10},
\]
whose mean is \(5\) and variance is \(7\).
If the mean and the variance of the first 8 observations
\[
x_1, x_2, \dots, x_8
\]
are \(4\) and \(3.5\), respectively, and
\[
x_9<x_{10},
\]
then the value of
\[
3x_9 + 2x_{10}
\]
is: