Multiple$-$Answer Choices $($There may be more than one answers for each question.$)$

$(50\%)$

$($G$)$

$($E$)$

$($H$)$

$($F$)$

$($I$)$

From the above drawings,

$(1)$ Find the structures whose actual degrees of freedom is $0$ or less.

$(2)$ Find the mechanisms whose mobility $($actual degrees of freedom$)$ is $1.$

$(3)$ Find the mechanisms whose mobility $($actual degrees of freedom$)$ is $2.$

$(4)$ Find out which are paradoxical over$-$constrained mechanisms.

$(5)$ Find the mechanisms which have redundant degrees of freedom.