$(6)1.$ For each of the structures shown state whether it is unstable, statically determinate, or statically indeterminate. If the structure is statically indeterminate, state the degree of indetenninacy. Structures a$)$ through d$)$ have beam$-$type members.

$($a$)$

$($b$)$

$($c$)$

$($d$)$

Structures e$)$ through f$)$ have truss$-$type members.

Diagonals are not connected where they cross.