Hello I need help on questions 8 and 13. Work would be appreciated if possible!

8. [-/3 Points] DETAILS SERPSE10 10.3.OP.008. 0/6 Submissions Used A race car driver is driving his car at a constant speed of 36.0 m/s on a circular track with a radius of 225 m. (a) What is the angular speed (in rad/s) of the car? rad/s (b) What are the magnitude (in m/s ) and direction of the car's acceleration? magnitude m/s2 direction Select--- Need Help? Read It13. [-/4 Points] SERPSE10 10.3.P.013. 0/6 Submissions Used ASK YOUR TEACHER In a manufacturing process, a large, cylindrical roller is used to flatten material fed beneath it. The diameter of the roller is 6.00 m, and, while being driven into rotation around a fixed axis, its angular position is expressed as 9 = 2.70tZ 0.550t3 where 9 is in radians and t is in seconds. (a) Find the maximum angular speed of the roller. rad/s (b) What is the maximum tangential speed of a point on the rim of the roller? m/s (c) At what time t should the driving force be removed from the roller so that the roller does not reverse its direction of rotation? :5 (d) Through how many rotations has the roller turned between t = 0 and the time found in part (c)? rotations Need Help