$1\mathrm{.}0$ For Problem $160,$ determine which of the structures shown in the accompanying $-$illustration are statically deterninate, statically. indeteminate $($incliding the degreeof indeterminacy$),$ and unstable as regards outer forces $(10pts)$

$($a$)$

$($e$)$:

$($h$)$

$($i$)$

$($I$)$

$($ri$)$