5 $$\begin{aligned} & A \quad k \quad h \quad t
& t \text { th } t
& \text { th } v \text { th th } v \text { th } t \text { th } t
& t \text { tt th th } \end{aligned}$$ $$\begin{gathered} \quad t \text { th ht } A \quad t
t \quad \text { tt } \quad \text { th } \quad W h \end{gathered}$$ $$\text { th v } \stackrel { h } { } \rightarrow \text { th }$$