86 of 773 corn kernels didn't pop: find 90% conf. int., ....

I have a problem solving this question for me to input in Excel

thanks so much

8.64: 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 percent confidence interval for the proportion of all kernels that would not pop.
(b) Check the normality assumption.
(c) Try the Very Quick Rule. Does it work well here? Why, or why not?
(d) Why might this sample not be typical?

Toomster said:

I have a problem solving this question for me to input in Excel

Click to expand...

I'm sorry, but I'm not seeing where the instructions for this exercise specify to do something with Excel...?

When you reply with that clarification, please include a clear listing of everything you have tried so far, along with the definition of what your book is calling "the Very Quick Rule". Thank you!

Eliz.