$11$:$248$

$4$G

$88$

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

$($A$)($B$)($C$)$

$($D$)($E$)($F$)$

$n^{b(A)}$

From the above drawings,

$(1)$ List all mechanisms whose mobility $($actual DOF$)$ is $1.$

$(2)$ List all mechanisms whose mobility $($actual DOF$)$ is $2.$

$(3)$ List all structures whose actual DOF is $0$ or less.

$(4)$ Find those mechanisms that have redundant degree of freedom.

$(5)$ Find those who are paradoxical over$-$constrained mechanisms.

$2.$ Explain the following terms

$(1)$ Mechanism

$(2)$ Machine