The tub of a washer goes into the spin-dry cycle, beginning from rest and reaching an angular speed of 6.0 rev/s in 13.0 s. At this point, the person doing the laundry opens the lid, and a safety switch turns off the washer. The tub dawdling to rest in 9.0 s. Through how many revolutions does the tub turn throughout this 22 s interval? Suppose constant angular acceleration while it is beginning and stopping.