Draw the deflection shape of the following structures. Note: ONLY qualitati curvature $($curved line $($concave up or down$),$ or straight line, with proper bou Can be drawn directly on the figure below.

$3\mathrm{.}1$ Point C is fixed.

$3\mathrm{.}2$ Point $A$ is fixed, point $B$ is a hinge, point $D$ is a roller support.

$3\mathrm{.}3$