Biting an unpopped kernel of popcorn hurts! As an experiment, a self-confessed connoisseur of cheap popcorn carefully counted 773 kernels and put them in a popper. After popping, the unpopped kernels were counted. There were 86.

(a) Construct a 90% confidence interval for the proportion of all kernels that would not pop. (Round intermediate calculations to 4 decimal places. Round your answers to 4 decimal places.)

The 90% confidence interval is from

to