Given: The six$-$bar shown in Figure $3$; at the instant shown, the coordinates of the pin joints are as follows: O$2$: $(0,0),04$:$(1\mathrm{.}5,0),A$:$(0\mathrm{.}250,0\mathrm{.}433),B$:$(2\mathrm{.}135,0\mathrm{.}874),C$:$(0,0\mathrm{.}5),D$:$(0\mathrm{.}999,2\mathrm{.}233),E$:$(3\mathrm{.}139,1\mathrm{.}146){}_2=5ra\frac{d}{s}cCw.$

$O2O=1\mathrm{.}5,O2A=0\mathrm{.}5,O2C=0\mathrm{.}5,AC=0\mathrm{.}2588,AB=1\mathrm{.}936,O4B=1\mathrm{.}08,O4E=2\mathrm{.}00,BE=1\mathrm{.}04,CD=2\mathrm{.}00,DE=2\mathrm{.}40.$ Find: The angular velocity of link $5$ : ${}_5,$ in rad$/$s$.$