A fan blade rotates with angular velocity given by ωz(t)= γ − β t2. part a calculate the angular acceleration as a function of time. express your answer in terms of the variables β, γ, and t. αz(t) = submitmy answersgive up part b if γ = 5.35 rad/s and β = 0.810 rad/s3 , calculate the instantaneous angular acceleration αz at t = 3.00 s .