[填空题]
The following diagraqnlimex2g6k2 ja5q p: t .x-:rm shows a cirk /t5v(jrf35uy dak.zum8rgs ok88knq:* w * pcle with the centre O and radius 8 cm.
Points $\mathrm{A}$, $\mathrm{B}$ lie on the circle and $\mathrm{AO}$ $\mathrm{B}=1.4$ radians.
1. Find the length of the minor arc A B . $cm^2$
2. Find the area of the shaded region. $cm^2$
