Problem $1[16$ Pts$]$

For each one of the following structures $($a to f$)$ explain whether they are:

Internally stable or not Ptcaso$]$

ii$.$ Externally stable or not $[0\mathrm{.}5$ Ptcase$]$

iii. Statically determinate or not $($only for extemally stable structures$).$ Also provide their degree of static indeterminacy. $[1$ Pucase$]$

$($a$)$

$($c$)$

$($c$)$

$($g$)$

$($b$)$

$($I$)$

$($b$)$