Member $AB$ has the angular velocity ${}_{AB}=2ra\frac{d}{s}$ and angular acceleration ${}_{AB}=8ra\frac{d}{s^2}.($Flgure $1)$

Part A

Determine the angular velocity of member $CD$ at the instant shown.

Express your answer in radians per second to three significant figures. Assume the positive direction is counterclockwise.

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Part B

Determine the angular acceleration of member $CD$ at the instant shown.

Express your answer in radians per second squared to three significant figures. Assume the positive direction is counterclockwise.alpha$\_($CD$)=21\mathrm{.}792$

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