Just flew in from Seattle last night. The word "hill" takes on a different meaning out there. No question in my mind that a 79 year old is a perfect candidate for an e-bike. If you want to look sporty the Specialized company has a few that will do the job, although any major brand will have something as well.
I have vowed to never own an e-bike, however I do recommend them to those that will benefit from one. Perhaps when I am 80 I will recommend one to myself!