220 mm B 260 mm Two friction disks A and B are to be brought into contact without slipping when the angular velocity of disk A is 270 rpm counterclockwise. Disk A starts from rest at time t = 0 and is given a constant angular acceleration of magnitude a, Disk B starts from rest at time t = 8 s and is given a constant clockwise angular acceleration, also of magnitude a. Determine: [Select] [Select] [Select] [Select] the contact velocity between disk A and B, in (m/s) the angular velocity of disk B, in (rad/s) the required angular acceleration magnitude a, in (rad/s²) the time, in seconds, at which the contact occurs