2 \(A t\)
\(t\) At \(t t\)
\(C t\) \(t t t\)

\(m\)

\(t\)

vttmt
\(m\)
vtt v \(_ { \text {m } }\) vttmt
th $$\begin{array} { c c c } A m & t &
m & t &
& &
& &
x & & v t y
x & y m m t y & t \end{array}$$ $$\begin{gathered} m m v t
t \quad t t \quad t \quad t \end{gathered}$$ Em mty mt
\(m\) m m

1. tt t mmt t \(t\) t \(t\)
   \(m\)