The tub of a washer goes into the spin-dry cycle, beginning from rest and arriving an angular speed of 5.0 rev/s in 12.0 s. At this point, the person doing the laundry opens the lid, and a safety switch turns off the washer. The tub slows to rest in 11.0 s. Through how many revolutions does the tub turn through this 23 s interval? Suppose constant angular acceleration while it is beginning and stopping.