A wheel is rotating about an axis that is in thez$-$direction. The angular velocity w$,$ is $-6\mathrm{.}00$ rad$/$sat t $=0,$ increases linearly with time, and is$+4\mathrm{.}00$ rad$/$s at t $=18\mathrm{.}0$ s$.$ We have takencounterclockwise rotation to be positive.Part AIs the angular acceleration during this timeinterval positive or negative?O positiveO negativeSubmitPart BHow long is the time interval during which thespeed of the wheel is increasing?Express your answer with the appropriate units.t$-$SubmitPart CRequest AnswertValuePart DUnitsHow long is the time interval during which thespeed of the wheel is decreasing?Express your answer with the appropriate units.Request AnswerSubmitValueSubmit Request AnswerUnitsAZ$$What is the angular displacement of the wheelfrom t $=0$s to t $=18\mathrm{.}0$ s$?$Express your answer in radians.?Request Answer?