A record on a turntable starts from rest and speeds up to 45 rpm in 2.5 seconds before it begins playing. (a) What is the final angular speed of the record, in rad/s? (b) What is the magnitude of the angular acceleration of the record? (c) How many revolutions has the record completed during this time? (d) The record then plays for 2.5 minutes. How many revolutions has the record completed during that time?