Senior Math

I am truly blessed. I have two 92 year old parents. They are still functioning very well on their own. They are independent and have all of their senses. As they age, I find that I am doing senior math. Everything needs to be repeated twice. The first time they tell me that I mumble. The second time when I scream, they hear me. The math equation for phone calls is: four calls on three phones to two people equals no one answering. I know they are okay, but I would still like them to answer on at least the seventeenth ring. I remind them three times to do something and they tell me that I need to relax. I hope I am doing senior math for another twenty years.