The panel assembly and attached $x-y-z$ axes rotate with a constant angular velocity $=0\mathrm{.}5ra\frac{d}{sec}$ about the vertical $z-$axis.

Simultaneously, the panels rotate about the $y-$axis as shown with a constant rate ${}_0=2\mathrm{.}7ra\frac{d}{sec}.$ Determine the angular acceleration

$$ of panel A and find the acceleration of point $P$ for the instant when $=90.$

Assume $a=17$ in$.,b=23$ in$.,c=19$ in$.$

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