I need help with these questions

Question 4 1.5 pts When the red light turns green at an intersection, you step on the accelerator and the speed of the car begins to increase from zero. If the radius of the wheel of your car is 0.45 meters, and the car's linear acceleration is a constant 10.5 m/s?, what is the angular acceleration of the car's wheels? Give your answer in units of radians per second squared. Note: Give only your numerical answer. Do not include units, else your answer will be incorrectly scored. Question 5 1.5 pts When the red light turns green at an intersection, you step on the accelerator and your car begins moving (it was initially at rest). Suppose the angular acceleration of the wheels of the car is 12.5 rad/s2. If the car accelerates for 8 seconds, what is the resulting angular displacement? Give your answer in radians. Note: Give only your numerical answer. Do not include units, else your answer will be incorrectly scored. Question 6 1 pts You are riding your bicycle down the road and decide to stop to take in the scenery. Initially, your bicycle tires are rotating at a frequency of 3 times per second. If it takes your bicycle 60 revolutions to come to a full stop, what is the magnitude of the angular acceleration (assume your acceleration is constant). Give your answer in units of radians per second squared. Note: Do not include units in your numerical answer, however, else your answer will be incorrectly scored