P$4\mathrm{.}17$ For the mechanism shown in Figure P$4\mathrm{.}17,$ determine the velocity of point $C.$ Use a complex number approach.

$r_{O_{2}A}=1\mathrm{.}5in$;$r_{AB}=1\mathrm{.}5in$;$r_{BC}=1\mathrm{.}0in$;$r_{AD}=4\mathrm{.}0in$

${}_2=45$;${}_2^{}=150rpmCCW$