A large number of adults are classified according to whether they were judged to need eyeglasses for reading and whether they actually used eyeglasses when reading. The proportions falling into the four categories are shown in the table.

	Used Eyeglasses for Reading
Judged to Need Eyeglasses	Yes	No
Yes	0.43	0.12
No	0.01	0.44

If a single adult is selected from this group, find the probability of each event.

a) An adult used glasses when they didn't need them.