Hello I need help on questions 1,2 and 3. Work would be appreciated if possible!

1. [-/1 Points] DETAILS SERPSE10 10.1.OP.001. 0/6 Submissions Used A disk starts from rest and uniformly increases angular speed to 0.21 rev/s in 25 s. (a) What is its angular acceleration in radians per second per second? rad/s2 (b) Would doubling the angular acceleration during the given period have doubled final angular speed? O Yes O No Need Help? Read It2. [/6 Points] SERPSE10 10.1.0P.002. 0/6 Submissions Used ASK YOUR TEACHER During a certain time interval, the angular position of a swinging door is described by 9 = 5.08 + 921' + 2.05t2, where 9 is in radians and t is in seconds. Determine the angular position, angular speed, and angular acceleration of the door at the following times. (a) t = O = rad a: = rad/s a = rad/s2 (b) t = 2.94 s = rad m = rad/s a = rad/s2 3. [/1 Points] DETAILS SERPSE10 10.1.P.002. 0/6 Submissions Used MY NOTES ASK YOUR TEACHER A bar on a hinge starts from rest and rotates with an angular acceleration a = 14 + 9t, where or is in rad/s2 and t is in seconds. Determine the angle in radians through which the bar turns in the first 4.51 s. rad Need Help