Problem 13: During the spin cycle the time dependent angular speed of a washing machine drum is given by the equation @() = at + br2 - cf where a = 1.2 rad/s2, b = 0.85 rad/s' and c = 0.025 rad/s'. At time t = 0 s, a point P on the washer drum is located at 00 = 1.9 rad.Part (a) Write an equation for the angular acceleration of the drum, as a function of time. in terms of the given parameters. Expression : Elf} = Select from the variables below to write your expression. Note that all variables may not be required. Ii, 9, Ila, a. b. c, d. g. h. j, k, In. 11. P. t Part (b) What is the angular acceleration, in radians per square second, at time t =23 s? Numeric : A numeric value is expected and not an expression. Elf} = Select from the variables below to write your expression. Note that all variables may not be required. li. a. 00, a. b. c, d. g. h.j,k, 111.11.1'. I Part (:1) What is the angular position of the point P on the drum, in radians, at r = 2.9 s? Numeric : A numeric value is expected and not an expression. 9(1) =