For each sentence below, first identify the modal verb(s). Then name whether it is expressing the meaning of permission/ability, obligation/necessity, or volition/prediction. a. I've got to take an exam at three o'clock. (obligation/necessity) b. The headliner is supposed to be go on stage next. (obligation/necessity) c. May I use the bathroom? (permission/ability) d. I'm going to hit the road! (volition/prediction)